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Old 07-08-2008, 08:33 AM   #1
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HELP!! Only stays running when on the gas

My 1997 Jeep will turn over but only stays running with foot on the gas. As soon as I take my foot off the gas it dies. Any help? My friend says it's the throttle position sensor?

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Old 07-08-2008, 08:55 AM   #2
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When the TPS ran out in my 97 that was about what it did. It would only run with the pedal down and even then seemed like it didn't know what it was doing. They don't cost too much and are an easy fix, just 2 screws and your ready to rock!

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Old 07-08-2008, 09:54 AM   #3
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More likely it's simply a dirty IAC (idle air controller). The IAC provides all the air to the engine when your foot is not on the accelerator pedal so your symptom points to that. The IAC is bolted onto the throttle body with two small torx screws, on the passenger-side of the throttle body, closest to the valve cover. Remove it, gently clean its solenoid actuated plunger (don't push/pull/turn the plunger) with throttle body cleaner and a rag/brush, then clean the hole in the throttle body its plunger fits into. Once it's clean, use the remainder of the can of throttle body cleaner to clean the interior of the throttle body per the instructions on the can.

There is no need to remove the throttle body from the engine to do any of this. Good luck.
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Old 07-08-2008, 10:20 AM   #4
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Incidentally, that symptom can also be caused by a defective throttle position sensor as described by JeepCop1 but it only costs $5 to first clean the IAC. If that doesn't do it, then it's off to the parts store for a new TPS since it can't be cleaned like the IAC can.
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