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:

Posted on Oct 16, 2010


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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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98 gmc jimmy starts hard runs give it gas 1500rpm boggs down!! and nothin else wont excel over 1500rpm boggs down!

It sounds like the fuel fiter is clogged. Change the filter. It is located under the driver side of the vehicle tucked up inside the frame rail. Be sure to let the vehicle sit long enough for the pressure to bleed off before removing the old filter.

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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...

Crank truck up and turn it off, pull the fuel pressure regulator vacuum hose off and see if it has fuel in it. If so that is your problem. Sometimes after you drive them and shut it off the fuel will leak into the intake causing a hard start problem. Just fixed a GMC 5.3 that way .

Feb 03, 2011 | 2000 GMC Jimmy

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How to change a fuel filter on my 2001 gmc jimmy

RElease pressure,,by loosening gas cap,find filter,each end of line has a tab inside if not out if inside need tool can but at part stores ,,push tool around linr @ pull line watch for gas to run out!!!!

Aug 11, 2010 | 2001 GMC Jimmy

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Check the fuel pump.

Jan 09, 2009 | 1991 GMC S-15 Jimmy

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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