1997 GMC Jimmy hard to start when warmed up

1997 GMC JIMMY
87,000 MILES • 6 CYL • 4WD • AUTOMATIC
Avatar
RAY BARCUS
  • MEMBER
  • 1 POST
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.
Mar 6, 2009 at 5:59 AM
Advertisement
Avatar
MERLIN2021
  • CERTIFIED EXPERT
  • 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.
Mar 6, 2009 at 8:26 AM