Question about 1999 Saab 9-5

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Idle stops and starts after long time

Runs well then sometimes salls when at idle, starts only after a long rest

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If your car stop end then only starts after long time that is a difect crankshaft sensor!

Posted on Aug 11, 2010

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Idles roughly, then low when stopped or in park, then dies. Decreasing gas mileage. Slow to accelerate


Sometimes that's caused by a vacuum leak near the manifold area.

Sometimes air in the coolant will cause an idle problem. Air will keep the air temp sensor from sending proper info.
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2002 Jetta 1.8t cuts offs sporadically


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Check your EGR Valve and your IAC. These can and are usually common problems with bad idle and at sometime your car will be hard to start and when you give it gas it will feel like it almost wants to just lunge forward really fast

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1 Answer

Hard start and rough idle.


Sounds like it's time for a tune up of the ignition system. That would be easiest. If not, have a mechanic check your cylinder compression.

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My 98 Ford Mustang Gt will not run at idle


Check your Idle air control motor, notorioius for causeing this problem. Hope this helps!

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Car stops running


most often times when you have poor idle conditions it is due to a faulty throttle position sensor(TPS) however if you have not had as tune up in a while a good start would be to replace the fuel filter first. over time they become clogged and will cause the vehicle to stall. Once the filter is replaced and the symptoms still occur then replace the TPS and this should solve the idle problem. please rate.

Dec 04, 2008 | 1999 Kia Sephia

1 Answer

Rough idle stalls at low rpm's


hello first check your idle with the car running foot on brake see were your rpm reading is if your below 500rpm check your label underhood for your curb idle setting second see if theres a adjustment screw you can increase were your gas cable lever rest against your set screw underhood if you feel confident enough remove your iac motor idle air control valve if the bore were the end of the pintle extracts out to close has varnish builup our carbon it will stick creating vacuum leak type senario causing stalling rough idle sometimes even no start conditions good luck

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