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Old 04-13-2011, 12:56 PM
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Straight Six idle issues ?

I have a 1994 Wrangler 5 speed I6. And a very weird thing is happening with the engine. It starts up fine and idles fine at start up (around 700 RPM as usual), but when I'm moving and take it out of gear (at stop at lights, stopping to turn, park, exit ramps etc.) the RPM's plummet to like 100 RPM and stay there till i hit the gas. Its very weird and I cant figure out whats wrong??? It hasn't stalled yet, but its harder to steer when its idling so low and the lights dim and the stereo lowers. Whats even crazier is when i come to a stop the RPM's slowly creep back up to normal. I hope some one can help me. Thanks GUYS!

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Old 04-13-2011, 01:07 PM   #2
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Sorta same thing is happening to me.
Pretty sure it's tps or throttle body.
Even thought I just got it back from the shop for the same reason :/

I'd say just clean your throttle body.
There are lots of write ups on here.
Btw is your CEL on?
If so go to advanced auto parts and see what codes it's throwing

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Old 04-13-2011, 01:36 PM   #3
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Mine Idles at 1500 at start up until it warms up and then drops to 700-900 for idle.

Mine is carbureted though so maybe that is a difference but I would think most engines would go into a fast idle at warm up to help charge the battery and give the oompf needed until operating temp is reached.
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Old 04-13-2011, 02:11 PM   #4
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same here undead-89, but i'm fuel injected. so i'd have to go with DOM on this one
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Old 04-13-2011, 02:30 PM
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Yeah mine is fuel injected and doesnt have a check engine light on. I am still not sure why it idles so low, anyone now what normal oil pressure is at idle for the I6 ?
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Old 04-13-2011, 03:26 PM   #6
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i don't know what normal is, but mine is usually just below 40.

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