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Rough idle can have several causes, but on a 10 year old car I would suspect a vacuum leak especially if it runs well under acceleration. Replace all under hood vacuum hoses. Replace them one at a time as to not get confused. Very inexpensive repair if done by the owner. If this does not correct the problem move to a complete tune up. New plugs, plug wires, & rotor.
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∙ 14y ago
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Rough idle on 99 dodge stratus?
Rough idle on a 99 Dodge Stratus is often caused by a clogged fuel filter or injectors. This prevents the engine from receiving enough fuel when needed.
99 Windstar rough idle when cold?
Needs a tune up. Also it sounds like somone is pumping gas without shutting of the car.
Very rough idle when dropped into gear on your 99 Chevy Tracker with the 2.0 engine runs fine otherwise have replaced the PCV and plugs no help?
you need the fast idle adjusted on the engine you may have idle set where it sounds fine in idle but not high enuff when dropped in gear.
What would cause your 99 suburban to idle rough and studder only at low RPM?
it only studders at low rpm it runs great at high rpm or accelerating only at idle and take off rpm
How do you fix a 99 Lexus ES300 that will not idle on the first try?
remove and clean the idle air control valve( iac ), and or replace unit. located on back of throttle body housing. try this first.
Why would '99 Chevy Malibu run rough from idle to 10 MPH when in gear and check engine light blinks?
autozone will scan codes for free.to see what is wrong!!
Why does your car die if you turn on air conditioner while driving and then come to a stop and how do you fix it on a 99 Ford Escort?
the idle air control valve most the time
What should the idle be set for a 1999 Chevy Tahoe?
idle speed for a 99 Tahoe
Rough idle when cold cougar?
If this is a '99 through '02 Cougar, this sounds like the so called "Moosing" problem, which is a problem with the Idle Air Control Valve (IACV), and is fixed by taking the IACV out, its connected to the upper intake manifold, and either cleaning it thoroughly, or replacing it.
How come my 99 dodge neon runs rough at idle?
This question can't be answered as there are too many possibilities. I would suggest a complete tune up and if that doesn't fix it, then take the car to a qualified, reputable repair facility. It could be anything from a clogged injector to a vacuum leak to things much more severe. Good Luck.
What would cause a rough idle when stopped on a 99 Toyotal Rav4?
I can't speak directly for a Toyota, but if you have a carberated system then you could be having problems with a leaking vacume hose or something in your EGR valve.
Door panel of an 99 Pontiac firebird?
what about it?
