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1997 GMC Jimmy hard to start when warmed up

Tiny
RAY BARCUS
  • MEMBER
  • 1997 GMC JIMMY
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 87,000 MILES
My 1997 Jimmy is hard to start after it gets warmed up. Starts fine when cold. After running and you shut it off it will not start unless you press the gas pedal down.
Friday, March 6th, 2009 AT 5:59 AM

1 Reply

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Check the TPS and the ECT Here's the risitance chart on the ECT. On a cold engine check ECT and IAT readings should be within 5-10 degrees of each other and resistance the same, use a scantool to get temp readings and a ohmeter to test resistance. TPS is as follows with a voltmeter.


https://www.2carpros.com/forum/automotive_pictures/62217_ect_2.jpg



https://www.2carpros.com/forum/automotive_pictures/62217_TPS_2.jpg


Shouild operate smooth, no spikes in voltage.
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Friday, March 6th, 2009 AT 8:26 AM

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