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1 RPM Going Up And Down At Idle: 11 Causes & Fixes [2022]
https://axlewise.com/rough-idle-meaning/
One common reason for RPM fluctuations is worn-out spark plugs. When the plugs are in bad condition, they can't produce a strong spark, making ...
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2 When your car's idle speed fluctuates, what are the most ...
https://www.quora.com/When-your-cars-idle-speed-fluctuates-what-are-the-most-common-components-that-fail-What-are-the-unsuspected-components-that-may-fail
Fluctuating idle is typically (though not always) caused by a vacuum leak or the throttle position sensor.
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3 Car idle is rough (idling RPM not stable) - Wheels Wisdom
https://www.wheelswisdom.com/kb/car-idle-is-rough-idling-rpm-not-stable/
Incorrect Idle Speed: While the average idle speed falls between 600 to 1,000 RPMs, if your vehicle is experiencing a rough idle it could be due to an incorrect ...
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4 RPM Fluctuations and What They Mean
https://southportautomotive.com/rpm-fluctuations-mean/
If your fluctuation in idle is also happening with rough engine idles, shaking or any other unexpected issues, it might be worth taking your ...
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5 6 Common Causes of RPM Fluctuation While Driving
https://completecar.ca/maintenance/rpm-fluctuation-while-driving/
Common causes of car RPM fluctuation · Bad Idle Air Control Valve · Vacuum Leaks · Worn-Out Spark Plugs · Faulty Throttle Pedal Position Sensor · Dirty Fuel ...
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6 What causes erratic engine idling? - Torque
https://www.torque.com.sg/features/causes-erratic-engine-idling/
Erratic engine idle can be caused by various factors, but the most common and likely cause is a dirty or malfunctioning Mass Air Flow (MAF) ...
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7 Idle Speed Fluctuates & Many Possible Causes ... - YouTube
https://www.youtube.com/watch?v=8oJyRHaqksM
25 key moments
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8 Rough Idle Causes And How To Fix Them - Auto Select
https://www.autoselectonline.com/article/rough-idle-causes-and-how-to-fix-them
Head gasket leak · Fuel pump failure · MAF (Mass Air Flow) sensor · ECT (Engine Coolant Temperature) sensor · IAC (Idle Air Control) valve · TPS (Throttle Position ...
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9 RPM fluctuation while idling or Driving | P0507 - YouTube
https://www.youtube.com/watch?v=ipuDTyrwiHg
The Car Doctor Pakistan
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10 Engine Revving Up and Down at Idle FIXED - YouTube
https://www.youtube.com/watch?v=c1UuN7kEQ2w
 in this video
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11 How to Fix a Car that Idles Poorly (Rough Idle) - YouTube
https://www.youtube.com/watch?v=KhvqT3blzVs
10 key moments
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12 What Does It Mean If My Car Shakes While Idling?
https://www.hollenshades.com/what-does-it-mean-if-my-car-shakes-while-idling/
The idle speed should feel consistent without skipping or slipping. In most of today's cars, an idle speed of 600 to 1000 RPMs is average. If ...
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13 RPM Fluctuation While Driving - Causes & How To Fix
https://mechanicbase.com/engine/rpm-fluctuation-while-driving/
Many RPM fluctuations are caused by transmission problems. It can also happen when the spark plugs are dirty or if there is a vacuum leak that ...
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14 Q: Engine idle fluctuates and dies. - YourMechanic
https://www.yourmechanic.com/question/my-rpm-is-broken-and-causes-me-to-stall-by-jonathan-w
Hi There! It sounds like you may have a dirty or failing idle air control valve causing your engine idle to fluctuate and eventually stall. In the mornings ...
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15 How much should RPM fluctuate at idle? : r/Cartalk - Reddit
https://www.reddit.com/r/Cartalk/comments/2l5n98/how_much_should_rpm_fluctuate_at_idle/
Typically when you adjust idle on an engine you set the midpoint of the fluctuations at the specified RPM, but there is almost always a +-50RPM spread that ...
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16 a different idle fluctuation problem - EricTheCarGuy
https://www.ericthecarguy.com/forums/topic/a-different-idle-fluctuation-problem/
The idle on vehicles will always change when there is an extra load on the engine, such as the A/C compressor engaging. Out of curiosity, how do ...
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17 engine idling problem | rpm up down problem - YouTube
https://www.youtube.com/watch?v=tyMLRgxSNpY
a2z car service
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18 How To Fix an Idle Surge Problem - AA1Car
https://www.aa1car.com/library/problem_idle_surge.htm
If a vehicle idles erratically and surges (idle speed is not steady and increases and decreases), the problem may be a buildup of carbon or fuel varnish ...
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19 What would cause fluctuating idle during cold startup?
https://www.civicforums.com/forums/217-mechanical-problems-vehicle-issues-fix-forum/365741-what-would-cause-fluctuating-idle-during-cold-startup.html
Re: What would cause fluctuating idle during cold startup? The engine needs more air to stay running while it's cold and it needs to run at higher RPM to speed ...
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20 Very small idle fluctuation - Honda Forum Discussion
https://honda-tech.com/forums/acura-integra-6/very-small-idle-fluctuation-1495438/
Problem is that when the engine is at operating temperature, and I'm sitting at a stoplight idling or whatever, there is just a slight up-and-down fluctuation ...
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21 Start up idle fluctuates. - North American Motoring
https://www.northamericanmotoring.com/forums/stock-problems-issues/307428-start-up-idle-fluctuates.html
On Startup my car fluctuates from 250 to 1500 RPM and bounces back and forth ... It doesn't seem to be dependent upon engine temp since it happens during warm.
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22 Reducing Automotive Engine Speed Fluctuation at Idle
https://ieeexplore.ieee.org/iel4/87/10987/00508888.pdf
Abstract-This paper concerns an automotive idle speed control problem. Specifically, a problem of reducing engine idle speed fluctuations is considered.
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23 Idle Fluctuation Concern on Hyundai Veracruz - RepairPal
https://repairpal.com/idle-fluctuation-concern-202
An idle fluctuation may be noted, the Check Engine Light may or may not illuminate. Replacing the throttle position sensor and updating the powertrain ...
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24 Engine Idle Fluctuation -what can cause this? - CarGurus
https://www.cargurus.com/Cars/Discussion-d649_ds482475
Engine Idle Fluctuation -what can cause this? - Can bad gas cause your rpms to flucuate? say from 700 to 1200 and then back down to 700 repeatedly? What ar.
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25 RPM fluctuation on idle and engine choking - diamondaviators ...
https://www.diamondaviators.net/forum/viewtopic.php?t=7461
Bryan, Odds are pretty good the solution is just a simple adjustment. Most likely the Idle speed is just set too low, or timing or idle mixture ...
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26 The Causes of an Idle Surge | It Still Runs
https://itstillruns.com/causes-idle-surge-8433643.html
Air Supply. A clogged or obstructed air filter can cause surging at idle, and foreign objects can enter the filter housing at any time. · Fuel Supply. Fuel ...
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27 Idle fluctuating?? - DodgeForum.com
https://dodgeforum.com/forum/2nd-gen-ram-tech/197876-idle-fluctuating.html
when mine went bad it was idling bad for a couple days then finally turned the check engine light on. its the plastic ring with a wire on it under the rotor in ...
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28 Idle fluctuation when AC Is on. - BMW 3-Series (E90 E92) Forum
https://www.e90post.com/forums/showthread.php?t=1712246
Your idle air control valve may be dirty and slow. Try cleaning it. Remember, the AC puts a load on the engine, and the valve is supposed to ...
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29 RPM fluctuation at idle in drive or neutral? - LS1Tech.com
https://ls1tech.com/forums/lt1-lt4-modifications/1039153-rpm-fluctuation-idle-drive-neutral.html
› ... › LT1-LT4 Modifications
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30 Why Is My Car Idling Rough? | The Family Handyman
https://www.familyhandyman.com/article/car-idling-roughly/
Vacuum leaks from a loose, cracked, or damaged vacuum hose affect air/fuel mixture causing an engine to idle rough. A major vacuum leak will ...
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31 RPM Fluctuation When the Engine Warms Up
https://www.2carpros.com/questions/rpm-fluctation-when-the-engine-warms-up
Pinch off various vacuum hoses while the engine is running and the problem is occurring. If you pinch the hose leading to a leak, the idle speed ...
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32 Why does the engine has RPM fluctuations? - Carphrases.com
https://carphrases.com/why-does-the-engine-has-rpm-fluctuations/
A weak battery charge can cause engine RPM to fluctuate especially when cold. The battery has enough energy to start the engine, but then the power drops ...
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33 97 Camry rpm fluctuation
https://www.camryforums.com/forum/general-tech-8/97-camry-rpm-fluctuation-17982/
The engine is either a inline 4 cylinder or a V6. ... Idle speed is controlled by the Intake Air Control (IAC) valve. This valve can become dirty and stick. An ...
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34 Rough / Fluctuating Idle - The Ultimate Ford Ranger Resource
https://www.ranger-forums.com/drivetrain-tech-37/rough-fluctuating-idle-140867/
Unplug your idling engine's IAC valve. Your engine should drop in idle or even die. I believe you do this one warm. An increase in idle means you have a leak.
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35 S63TU Engine idle fluctuations and Stalling - Remedy inside!
https://f15.bimmerpost.com/forums/showthread.php?t=1858262
When Idle begins to fluctate, its actually AFR that's bouncing around. The Bigger the AFR spike to bigger the idle dip. SFTF tries to compensate ...
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36 94 626 Fluctuating idle - Mazda Enthusiast Forums
https://www.mazdaforum.com/forum/mazda-323-mazda-626-mazda-929-24/94-626-fluctuating-idle-2751/
If there is no change in engine speed then valve is not operating and will probably need to be cleaned or replaced. The IAC valve is located on top of the ...
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37 RPMs Fluctuating at idle - Audizine Forums
https://www.audizine.com/forum/showthread.php/846207-RPMs-Fluctuating-at-idle
An O2 sensor going bad can cause rpm fluctuation as well. Jeremy Clarkson: "So when you were saying that it won't slide, what you meant was, 'I ...
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38 rpm fluctuating on idle | Mercedes-Benz Forum
https://www.benzworld.org/threads/rpm-fluctuating-on-idle.3027190/
it only fluctuates on idle when the engine is hot and the gear on P or N position. you know that when the engine is cold it revs at higher rpms ...
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39 Idling car engines may surge for several reasons - AZCentral
https://www.azcentral.com/story/money/business/consumers/2015/08/28/idle-car-engines-surge-several-reasons-cbt/71333320/
It's also possible your idle air control motor is going bad. The idle air controller is simply a computer-controlled motor that controls idle.
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40 Fluctuating idle, could it be the alternator? - RX7Club.com
https://www.rx7club.com/3rd-generation-specific-1993-2002-16/fluctuating-idle-could-alternator-225809/
When you press the brakes you load down the alternator which loads the engine, all 100% normal. Bouncing idles all almost 99% caused by too much air entering ...
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41 Fluctuating idle - BoatingABC.com
http://www.boatingabc.com/forums/ubbthreads.php/topics/565314/fluctuating-idle.html
Besides every auto parts store I have ever been in has cans of solvent just for this purpose. Tells me this is an issue with a lot of engines.
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42 RPM's fluctuating at idle - then engine stall - BIMMERPOST.com
https://www.1addicts.com/forums/showthread.php?t=1311454
I went online and couldn't find anything definitive, I saw similar examples of other users describing this erratic idle and in most cases they were speculating ...
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43 Engine idle fluctuation - Jeep Wrangler Forum
https://www.wranglerforum.com/threads/engine-idle-fluctuation.144872/
The idle drops just below the 1st tick mark on the speedometer (2-300 rpm) and the engine must think its dying so the throttle sensor bumps ...
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44 Fluctuating Idle on Warm Start? - BMW M3 Forum (E90 E92)
https://www.m3post.com/forums/showthread.php?t=836938
› forums › showthread
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45 Rpm fluctuates at idle when hot along with engine shake
https://www.silveradosierra.com/threads/rpm-fluctuates-at-idle-when-hot-along-with-engine-shake.746985/
› threads › rpm-fluctua...
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46 Fluctuating idle at temp - Subaru Outback Forums
https://www.subaruoutback.org/threads/fluctuating-idle-at-temp.532258/
At temperature, idle fluctuates from 700 to 800 to 700 to 800 ... 75, 70, I don't see "cycling" of the engine RPM or any changes in RPM ...
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47 Idle fluctuates from 500 to 1200 RPM - Ford Truck Enthusiasts
https://www.ford-trucks.com/forums/446431-idle-fluctuates-from-500-to-1200-rpm.html
The EEC monitors the engine RPM, if it drops too low it will open the Idle AIR Bypass Valve (IAB) more to bring the Idle up and of course it will close it some ...
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48 Engine Idle Speed Fluctuates Intermittently, when Shifting into ...
https://static.nhtsa.gov/odi/tsbs/2015/MC-10147761-9999.pdf
Engine Idle Speed Fluctuates Intermittently, when Shifting into Gear. MODEL. E70 (X5). E71 (X6). With the N63 engine without option 2VA (Adaptive Drive).
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49 Rpm goes up and down during idle - Hyundai Forums
https://www.hyundai-forums.com/threads/rpm-goes-up-and-down-during-idle.502873/
I have rpm fluctuation when i put in idle after warmin up the engine . I've done cleaning the throttle valve ,change the alternator and ...
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50 Engine Idle Fluctuates, Low RPM when stopping, Keeps dying
https://www.jeepcommander.com/threads/engine-idle-fluctuates-low-rpm-when-stopping-keeps-dying.54113/
› threads › engine-idl...
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51 Idle fluctuates between 500-1000 for a few seconds, then ...
https://www.rx8club.com/series-i-trouble-shooting-95/idle-fluctuates-between-500-1000-few-seconds-then-smooths-267040/
Or, the injectors could have been wired incorrectly if there was engine work done recently. There was a case like this recently and IIRC that was the cause.
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52 5 Symptoms of a Bad Idle Air Control Valve (& Replacement ...
https://oards.com/symptoms-of-a-bad-idle-air-control-valve/
When the engine is running but the vehicle is not moving, this means the engine is idling. During this time, the number of revolutions per ...
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53 Resolved: Idle RPMs fluctuate and engine hesitation
https://mechanics.stackexchange.com/questions/22482/resolved-idle-rpms-fluctuate-and-engine-hesitation
Quite often surging like this is caused by not enough air getting passed the butterfly valve in the throttle body when the butterfly is ...
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54 Engine idle fluctuation - XBimmers | BMW X3 Forum
https://x3.xbimmers.com/forums/showthread.php?t=1122930
Brakes, wipers and a subtle engine idle fluctuation. Sometimes when i'm waiting at a light or in Park and the engine is just idling, ...
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55 325e constant idle fluctuation - Bimmerforums
https://www.bimmerforums.com/forum/showthread.php?2073543-325e-constant-idle-fluctuation
The only down side is when you first start up a cold engine, you have to keep your foot on the gas pedel until engine warms up enough then ...
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56 Minor fluctuations to RPMS while idling. Is this normal? Tune ...
https://www.toyota-4runner.org/3rd-gen-t4rs/300041-minor-fluctuations-rpms-while-idling-normal-tune-up-please-help.html
The RPM fluctuation was just an estimate when looking at the tach, ... Its job is to bring engine speed up a little at idle to prevent ...
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57 Significant rough idle/fluctuations on cold start
https://www.m5board.com/threads/significant-rough-idle-fluctuations-on-cold-start.515090/
The warm restart idle fluctuations you describe may indicate you need to replace the carbon filter in your DTML (fuel vapor recovery) system.
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58 RPM Fluctuation at Idle? - Supra Forums
https://www.supraforums.com/threads/rpm-fluctuation-at-idle.495026/
you have a vacuum leak, which is supported by the pic of the missing hose. Unmetered air going into engine is going to be caught by 02 sensor, ...
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59 2014 Camaro RS idle fluctuation - Camaro5.com
https://www.camaro5.com/forums/showthread.php?t=547296
2014 Camaro RS idle fluctuation 5th Gen Camaro SS LS LT General Discussions. ... No engine will be competely still.
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60 SOLVED: RPM fluctuates while stop - Toyota - Fixya
https://www.fixya.com/cars/t23790473-rpm_fluctuates_while_stop
run the fault codes as the engine idle is being affected by a faulty sensor . The vibrations are probably because the idle rpm's are too low. Read full answer.
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61 Idle RPM fluctuation - MustangForums.com
https://mustangforums.com/forum/2005-2014-mustangs/737159-idle-rpm-fluctuation.html
Idle RPM fluctuation · With vehicle at a complete stop, set the parking brake. · Put gearshift in "P" (Park), turn off all accessories. · Run the engine until it ...
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62 idle rpm fluctuation - Chevrolet Corvette Forum Discussion
https://www.corvetteforum.com/forums/c1-and-c2-corvettes/3964044-idle-rpm-fluctuation.html
If you suspect a lean mixture from the carb or a leak, you can slowly close down the choke plate while the engine is idling. If you're lean, at ...
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63 Fluctuating idle speed - MBWorld.org Forums
https://mbworld.org/forums/c-class-w203/244861-fluctuating-idle-speed.html
C-Class (W203) - Fluctuating idle speed - My 1.8K has an intermittent idle ... push it down the engine stumbles and then catches up to the correct rpm.
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64 PD- Minor fluctuations in RPM at idle? - TDIClub Forums
https://forums.tdiclub.com/index.php?threads/pd-minor-fluctuations-in-rpm-at-idle.372838/
Our PD hunts at startup and sometimes when warm too. I noticed it the other day when coming to a stop and the engine was hunting around a bit.
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65 F150 5.4 fluctuating idle when warm
https://www.f150forum.com/f6/f150-5-4-fluctuating-idle-when-warm-96956/
There's nothing particular that would cause that to happen and NOT set a check engine light outside of the iac. I'd clean the intake and run some Lucas fuel ...
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66 Idle fluctuating from 1000-1300 RPM, why??
https://www.preludepower.com/threads/idle-fluctuating-from-1000-1300-rpm-why.362705/
If you get the engine to idle without the IACV and no fluctuation that is good. The idle without IACV should be like 500 rpms. You can then try ...
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67 idle fluctuation and whistling noise from the engine 06 530
https://5series.net/forums/e60-discussion-2/idle-fluctuation-whistling-noise-engine-06-530-a-151274/
E60 Discussion - idle fluctuation and whistling noise from the engine 06 530 - Started car in the morning and noticed idle fluctuation.
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68 ('03-'05) - Idle fluctuation | Subaru Forester Owners Forum
https://www.subaruforester.org/threads/idle-fluctuation.238449/
Hi all, I have a problem (at least I think it's a problem) - when stopped and idling for any amount of time, the engine will speed up to ...
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69 Rough Idle/fluctuating Rpms - Mitsubishi Forums
https://www.mitsubishi-forums.com/threads/rough-idle-fluctuating-rpms.52529/
Usually if there's a vacuum leak somewhere the idle surge would be higher around 1000-1500rpm fluctuation. This looks like there's a problem ...
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70 500 to 3000 RPM Rapidly Fluctuating Idle - Club RSX
https://www.clubrsx.com/threads/500-to-3000-rpm-rapidly-fluctuating-idle.1260727/
› threads › 500-to-3000-rpm-...
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71 RPM fluctuation / idle issue - DODGE RAM FORUM
https://www.ramforumz.com/threads/rpm-fluctuation-idle-issue.151864/
My truck will sometimes die at idle, lets say once out 30 trips ... I have the same engine and can address the surging when you turn the ...
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72 fluctuating idle / high idle problem - Nissan Frontier Forum
https://www.clubfrontier.org/threads/fluctuating-idle-high-idle-problem.51812/
It mainly seems to be idlling higher than normal, then slowly drops back down to the normal idle. Other than the idle problem, the engine seems ...
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73 Engine RPM Fluctuation When Cold At Idle | Tacoma World
https://www.tacomaworld.com/threads/engine-rpm-fluctuation-when-cold-at-idle.439849/
Engine RPM Fluctuation When Cold At Idle ... pressure that I apply to the steering wheel will bump the RPM up 300-400 RPM.
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74 Fluctuating Idle | Subaru Impreza Owners Club - Type-RA.com
https://www.type-ra.com/subaru-forum/threads/fluctuating-idle.13233/
that's normal. it should do that for a few min until the engine starts to warm up and the revs should gradually go down to 900rpm.
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75 Fluctuating Idle? - MY350Z.COM - Nissan 350Z and 370Z ...
https://my350z.com/forum/2003-2009-nissan-350z/617859-fluctuating-idle.html
Fluctuating Idle? · 1.Clean MAF sensor/Throttle body · 2.Oil change and cleaning out VTC sensors and changing gaskets. (Maintenance things) · 3.
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76 Idle Fluctuation on Volvo S60 - Maintenance/Repairs
https://community.cartalk.com/t/idle-fluctuation-on-volvo-s60/70970
The first thing to check for is a defective Idle Air Control/Air By-Pass valve. This device is what controls the engine idle speed anytime the ...
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77 Intermittent Idle fluctuation - Dodge Dakota Forum
http://www.dodgedakota.net/boards/v8/8935.html
also force the truck to do an idle air relearn. I had similar problems on my WJ replaced the iac motor and the tps sensor. with ignition off ...
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78 Rpms fluctuate up and down from idle - S2KI Honda S2000 ...
https://www.s2ki.com/forums/s2000-under-hood-22/rpms-fluctuate-up-down-idle-1096109/
Have you cleaned the IAC? Themikewoo , 08-18-2014 07:09 AM. Any check engine lights?
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79 High Idle and fluctuation problem - Boost cars, acquire cats.
https://www.miataturbo.net/engine-performance-56/high-idle-fluctuation-problem-68664/
Engine Performance - High Idle and fluctuation problem - Last night, I took the intake manifold off my 94 because the coolant hoses running ...
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80 Idle Fluctuations | Ford Focus ST Forum
https://www.focusst.org/threads/idle-fluctuations.72673/
The car, on almost every warm start ups will drop RPMs and shudder. Also, on cold starts sometimes the idle will hunt befoer settling at the ...
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81 fluctuating idle. help please! | 8th Generation Honda Civic Forum
https://www.8thcivic.com/threads/fluctuating-idle-help-please.237899/
the idles keep fluctuating even when the engine is cold. someone please help me out. i don't know what to do and im pretty worried about what ...
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82 Occasional RPM fluctuation : Getting to the root cause
https://www.team-bhp.com/forum/technical-stuff/135586-occasional-rpm-fluctuation-getting-root-cause.html
However fluctuation from 260-310bar in idle fuel pressure which should be at 280 bar for a Safari class engine. I do not want to go on a part ...
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83 Idle RPM fluctuates... - The 1947 - Present Chevrolet & GMC ...
http://67-72chevytrucks.com/vboard/showthread.php?t=53004
Engine & Drivetrain. ... The trouble is this fluctuating RPM at idle. I originally set my idle speed at 800 RPM, but every once in a while ...
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84 Vauxhall Zafira idle fluctuation - Pico Technology - picoauto
https://www.picoauto.com/support/viewtopic.php?t=9643
... Vauxhall Zafira 1.7CDTi ecoflex with idle fluctuation problem. ... but when the engine getting warmer idle speed begins to fluctuate.was ...
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85 Surging Idle Problems | DF Kit Car Forum
https://dfkitcar.com/forum/index.php?threads/surging-idle-problems.1191/
So I am having continued issues with my 2.0L SS/SC engine surging (fluctuating in RPM) at idle. It surges from about 800-1200 RPM's ...
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86 Idle fluctuation - MINI Cooper Forum
https://www.mini2.com/threads/idle-fluctuation.358082/
IF ANYONE NEEDS ENGINE REFRESH REBUILDS FEEL FREE TO ASK I WILL PRIVATE MESSAGE YOU SEE WHAT I CAN DO TO HELP',,, I DO A FIXED PRICE FOR ...
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87 fluctuating idle on startup - Toyota Sienna Forum
https://www.siennachat.com/threads/fluctuating-idle-on-startup.8284/
An engine light code for an idle air control valve means the engine software is trying to adjust the IAC valve in order to stabilize the idle, ...
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88 2009 Tahoe Rough Idle RPM Fluctuation
https://www.tahoeyukonforum.com/threads/2009-tahoe-rough-idle-rpm-fluctuation.90228/
Check TB seal, intake piping, etc. Maybe a constant vacuum leak, check under the engine cover. Definitely sounds like you've got come unmetered ...
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89 RPMs fluctuate up & down at idle on startup
https://www.hondacivicforum.com/forum/engine-internal-11/rpms-fluctuate-up-down-idle-startup-91629/
Engine & Internal - RPMs fluctuate up & down at idle on startup - When I start the car, not just cold days, but even in the hottest days of the summer, ...
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90 RPM fluctuates at idle. | Volkswagen Passat Forum
https://www.passatworld.com/threads/rpm-fluctuates-at-idle.397737/
› threads › rpm-fluctuates...
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91 Application of adaptive control to the fluctuation of engine ...
https://www.sciencedirect.com/science/article/pii/S0020025507000163
Idle speed control in a fuel-injection engine system has focused on controlling long-term averages of engine speed, but short-term ...
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92 HELP - RPM Fluctuation at Idle and on throttle
https://www.odyclub.com/threads/help-rpm-fluctuation-at-idle-and-on-throttle.336994/
Have the valves ever been adjusted? An engine in need of that service can misfire. Dave. 2002 Odyssey EX Fern ( ...
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93 Fluctuating idle on my '92 - Full Size Ford Bronco Forum
https://www.fullsizebronco.com/threads/fluctuating-idle-on-my-92.484193/
Idle Air Trim is designed to adjust the Idle Air Control (IAC) calibration to correct for wear and aging of components. When engine conditions ...
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94 RPM at idle fluctuate (slightly) - 6SpeedOnline
https://www.6speedonline.com/forums/997/313278-rpm-idle-fluctuate-slightly.html
You may want to seafoam the engine through the throttle body. Same basic pricipal but you run the car with a small red tube (think WD40) inside ...
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95 RPM Fluctuation at idle - Buick Forums
https://buickforums.com/forums/threads/rpm-fluctuation-at-idle.57830/
The throttle body may need a good cleaning along with the idle air control. (if used) Could also be a vacuum leak. Last edited: Jul 11, 2020.
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96 RPM Fluctuation at Idle- Porsche Premier Dealer Mechanic ...
https://www.planet-9.com/threads/rpm-fluctuation-at-idle-porsche-premier-dealer-mechanic-stumped.32766/
There are some pretty knowledgeable tuner/modders around these boards that seem to know a lot about these engines and systems. Do any of you ...
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