Question about 1999 Jeep Cherokee 4WD

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1998 jeep cherokee wont start unless gas pedal is pressed to the floor will idle fine but revs high when i touch the gas pedalal

COld starts it will start fine and run great but after i let it warm up will start to hesitate & when i touch the gas it will rev up high rpm for long periods of time before returning to idle. then when i shut it off it wont start again unless gas pedal is pushed to the floor then wants to start but hesitates and dies again. have replaced battery, distributer tps iac sensors tested the maf sensor checks fine, looked for vacume leaks pulled grounds and cleaned them, about to ship it to the junk yard someone please help????????????????????????????

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Had this problem too, and you need to check that your TPS sensor plug.harness is tight, the best way to do that is to actually unplug it, blow it out and then plug it back in. But the same problem happened again and it turned out to be the CPS plug had come loose, again check it and make sure it's seated well, and everyone will tell you to replace them, but if take a wooden dole, or stick and can tap yours gently down towards the transmission I've found that it works well after that.

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Posted on Oct 05, 2017

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SOURCE: jeep fast idle

check for broken pcv valve

Posted on Feb 05, 2010

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