Question about 1998 GMC Yukon

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The motor tries to die when decelerating or stopped if i dont keep foot on gas pedal

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It may be the idle position sensor. Take it to an autoparts store for a code. This are electronic sensors. Ask the guy where it is located in your particular car.

Posted on Nov 20, 2009

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Engine dies if I dont keep foot on the gas - AnandTech Forums

forums.anandtech.com > Social > The Garage

AnandTech
Jun 23, 2007 - 20 posts - ‎16 authors
Engine dies if I dont keep foot on the gas The Garage. ... foot on the gas the RPMs immediately drop to zero and the whole car dies. ... In that case the throttle body just had enough gunk on it that it was ..... My battery died two days ago and I got a boost but it stalled immediately after taking my foot off the gas.

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It starts and will only stay running if I keep my foot on the gas. As soon as I let off the car dies.


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southernelectronics.com

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Car starts after taking foot off gas car shuts down 2001 mit 3.0 v-6 spider


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------------Pushing on the gas pedal, but the car slows down? Gas pedal to the floor and the car slows down? http://technoanswers.blogspot.in/2012/02/pushing-on-gas-pedal-but-car-slows-down.html
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My car hesitates when i stop at a stop sign or light


Try o2 sensor that fixed my 92 park avenue with same problems. I had to keep my foot on the gas pedal at stops or it would die. The o2 sensor is located at the back of the motor on the exhaust manifold. It screws in to it and has a little wire running out that clamps on the fire wall.

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1 Answer

Harsh downshift into second gear when decelerating. Is there a software upgrade or would a transmission flush help?


a transmission flush may help, but try this first,without touching the gas,put the car in drive and let it get to top speed(about 30/35mph)STOP, then use 1/3rd gas pedal(do not move your foot)and let it accelerate to about 60/70mph,STOP....then,if safe,floor the gas pedal to about 60/70 mphSTOP.then drive as normal.
the gearbox is computer controlled and if you use kickdown a lot or you change gears yourself then it will be harsh,try only using 1/3rd of the gas pedal(boring)BUT you will see a massive increase in gas mileage/comfort....also check fluid level every 2k.

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