Question about 1990 Oldsmobile Cutlass Ciera

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Car idles at 2200 rpm. Slight miss at normal speed and idle. Bad MPG. Somtimes idles normally. Replaced plugs and wires. Engine light goes on and off.

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Sounds like a bad vacuum leak. Check all the engine vacuum hoses, make sure none are broken/cracked/disconnected/missing.

Posted on Oct 02, 2009

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Toyota corolla hatch 2002 idle at 2000 rpm when


All the above is normal , except 2000rpm is a little high at idle . can be adjusted down to 1500rpm. the computer adjusts the engine speed . in drive the transmission loads up the engine idle drops to 1000rpm . in park engine unloaded rpm increase all normal.

Sep 17, 2014 | Cars & Trucks

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Why does my 1998 gmc jimmy rpm drop so low when its warm causing a miss in the engine


The truck ECM computer controls the idle speed based on a number of engine parameters. Idle drops to a minimum preset level when engine coolant reaches normal operating range and the engine goes into closed loop control. This idle is typically set at around 575 rpm, and cannot be changed without reprogramming the ECM. The miss is not caused by the idle speed - unless the engine is tuned properly and has not lost compression, this idle speed can result in a rough running engine at idle (typical with older 4.3L Vortec engines). Best bet is to get a complete tuneup which will include checking the O2 sensors, catalytic converter and cleaning the IAC valve and throttle body.

May 20, 2014 | 1998 GMC Jimmy

1 Answer

I have a timing problem. Low idle speed that is intermitten and causes a stumble at starts. This problem also occurres during normal running RPM's. Missing electronic signal but intermitten?


Could be bad sensor whether crank sensor, sam sensor, idle air control sensor, bad ignition module, bad coil or even timing belt. if you have a service engine soon light/creck engine light it's more than likely a sensor. If no light, probably timing belt/fuel filter plugged/ or weak fuel pump.

Jan 17, 2013 | 1995 Toyota Camry

1 Answer

Missfiring detected in OLDSMOBILE intrigue 2002 3.5L


For engine misfiring problem check the help links mentioned below. Click the link below to go through the troubleshooting procedure :---- Engine misses and truck jumps? Hard to down shift? Issue with high gear only? http://technoanswers.blogspot.in/2012/02/engine-miss-and-truck-jumps-hard-to.html

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Bad miss at idle?

http://technoanswers.blogspot.com/2012/01/bad-miss-at-idle.html

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While stop engine idles like cylinder missing?

http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

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Engine Misfire codes for car?

http://schematicsdiagram.blogspot.com/2011/12/engine-misfire-codes-on-chevrolet.html
Engine Misfire codes?

http://schematicsdiagram.blogspot.com/2011/12/engine-misfire-codes-on-chevrolet.html

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Misfire on cylinder 4?

http://schematicsdiagram.blogspot.com/2011/12/misfire-on-cylinder-4.html

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Oil on spark plugs and car misfires?

http://technoanswers.blogspot.in/2012/02/oil-on-spark-plugs-and-car-misfires.html

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This will help.

Thanks.

Jan 30, 2012 | 2002 Oldsmobile Intrigue

1 Answer

1996 ford bronco 5.8 litre, auto, engine idle has


Do you have a check engine light on? First thing I would do is unplug the IAC motor when the engine is warm. If the idle speed doesn't change you have a vacuum leak or a bad IAC motor. If the idle speed goes down you might have a bad TPS or IAC

May 31, 2010 | 1996 Ford Bronco

1 Answer

Missing of engine in idle or parking when cold


not normal. bad spark plug wires they may be gapping or jumping spark. also maybe coil pack is doing same thing.

Apr 23, 2010 | 2005 Toyota Corolla

1 Answer

RPM is over 400 rpm higher than it should be with no gas pedal.


Could be several things.. I would suggest replace the neutral safety switch, all O2 sensors and fuel and air filters, PVC valve and if needed plugs n wires..
The issue could also be a bad throttle body.. Should be a good idea to get it hooked up to a diagnostic machine - get the codes and then you will know more of what you are dealing with..

Have a great day !!

Apr 09, 2010 | 2000 Saturn SL

1 Answer

2006 ram, 4.7L. idle speed is iratic on cold starts. rpm goes from 700 to 1500 and back again until I put it in gear. fuel milage has dropped by 2 mpg. this happened after I changed spark plugs (used oem...


Idle flare is normal on all newer fuel injected cars. I think maybe you got a little paranoid,probably first spark plug change done by you. Gas milelage is easily explained in 2 ways, one the gov't is making the gas companies put oxygenated fuel into the gas & 2 you could go with a set of bosch oxygen sensors,pick up 15% more gas mileage

Jun 21, 2009 | 2006 Dodge Ram

2 Answers

New Sparkplugs, Now Trouble


there are a number of cars that dont like any kind of platinum plug check for bad plug wires get a squirt bottle with plain water and spray a nice mist on the wires while running and listen and look for arching if i remember correctly grand ams have aluminum heads and have instructions stating that the engine must be cool before removing spark plugs or risk warping the head

Apr 03, 2009 | 2004 Pontiac Grand Am

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