sometimes i put clutch in and engine goes up to 4000 rpms. - Jeep Wrangler Forum
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Old 06-18-2012, 12:31 AM   #1
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sometimes i put clutch in and engine goes up to 4000 rpms.

This only happens once a week. I hit the gas and it goes back to idle under 1000rpms. Why?

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Old 06-18-2012, 12:33 AM   #2
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Foot still on the gas . Even a little ??

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Old 06-18-2012, 12:49 AM   #3
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Foot off and braking when it happens. I even took floor mats out just in case. If I let clutch out (in gear) rpms go down. Then in have to give gas so I don't stall.
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Old 06-18-2012, 12:55 AM   #4
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I don't know mate . Next guy should
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Old 06-18-2012, 01:26 AM   #5
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I'm putting my bets on a faulty TPS sensor (throttle position sensor). Not 100% sure, but that's what I would change first if it were mine and I wanted to throw parts at it.
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Old 06-18-2012, 01:29 AM   #6
Knows a couple things...

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You've likely got a vacuum leak, especially if the intake manifold has ever been off.
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Old 06-18-2012, 03:12 PM   #7
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Any other thoughts out there?
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Old 06-18-2012, 03:19 PM   #8
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Tps. $45 at local parts store. Will increase some power too!
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Old 06-18-2012, 03:28 PM   #9
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Quote:
Originally Posted by BigGreenMachine
Tps. $45 at local parts store. Will increase some power too!
Where is that located? What does it look like?
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Old 06-18-2012, 03:36 PM   #10
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Hey my 98 tj does the same thing..intake manifold has never been off(not to my knowledge)..I actually put up a thread about it a few weeks ago..didn't get to the root of the problem with any of the responses..also happens when I put the jeep into reverse with foot on clutch..and it's impossible to get it out of gear without letting it stall out..getting frustrated..
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Old 06-18-2012, 03:50 PM   #11
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Quote:
Originally Posted by rwhitmore74

Where is that located? What does it look like?
Firewall side of the throttle body
Pictures taken from front of the Jeep
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Old 06-18-2012, 04:05 PM   #12
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Quote:
Originally Posted by Logirl
Hey my 98 tj does the same thing..intake manifold has never been off(not to my knowledge)..I actually put up a thread about it a few weeks ago..didn't get to the root of the problem with any of the responses..also happens when I put the jeep into reverse with foot on clutch..and it's impossible to get it out of gear without letting it stall out..getting frustrated..
Did you replace the tps Senor? What else have you attempted?
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Old 06-18-2012, 04:32 PM   #13
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Quote:
Originally Posted by rwhitmore74

Where is that located? What does it look like?
Firewall side.
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Old 06-18-2012, 05:38 PM   #14
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Thanks
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Old 06-18-2012, 06:17 PM   #15
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Np. Hope it works. I had to replace mine three times before it stopped "chugging" down the highway. It drove like the gas peddle was getting tapped at random.
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Old 06-18-2012, 06:19 PM   #16
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You'll need a good #20 torx bit to get the two torx screws off. Make sure to depress the tab at the end of the wire harness connector after you slide the red tab back to get the connector off without breaking the lock tab that holds it on. It's best to do it with the hood all the way back to the windshield and when the engine isn't so hot.
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Old 06-19-2012, 11:00 PM   #17
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I have no other issue then the Tom's going up with clutch in. Other then that it seems just fine. Still think that's the problem?

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