Question about 2001 GMC Jimmy

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My 2001 gmc jimmy runs fine till gets to operating temerature. once at operating temp engine boggs down when you push on the gas. changed coolant sensor didnt help

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Here are two different websites they may help, Tim:

http://wiki.answers.com/Q/What_would_cause_a_car_to_cut_off_when_hot

http://www.2carpros.com/topics/stalls.htm

Posted on Oct 16, 2010

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1 Answer

2001 gmc jimmy acceleration problems


Have you checked base fuel pressure at the injectors ?
Base fuel pressure when cranking or at idle should be at least 60psi or more.

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I have a 2000 gmc jimmy 4x4. it has a 4.3 vortec engine. about a year ago it blew a head gasket and i had it repaired. but now it's getting to where it's hard to start once it reaches operating temp. i...


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How to change a fuel filter on my 2001 gmc jimmy


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Aug 11, 2010 | 2001 GMC Jimmy

2 Answers

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1 Answer

Only starts when cold


I'm not familiar with your truck but this sounds like a cold-start valve that is stuck and allowing excessive gasoline into the intake system. If this is the case, you probably have miserable gas mileage right now since the engine would be running rich continuously.
Starting it warm, probably is causing some mild flooding and getting the plugs wet so they can't fire.
Try this: with the engine hot/warm; press the accelerator slowly all the way down, then try starting it. If it starts this way, this would be an indication that the engine is getting too much fuel for its temperature and opening the air supply fully helps to change the air-fuel ratio sufficiently to allow it to start.   

Nov 17, 2008 | 2001 GMC Jimmy

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