Rpm drops when i hit a bump. - JeepForum.com

 
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post #1 of 7 Old 10-03-2012, 10:07 AM Thread Starter
duhkooter
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1994 ZJ 
 
Join Date: Sep 2012
Location: agawam
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Rpm drops when i hit a bump.

when im driving and hit a bump i used to get speed wobbles alone. as of lately the speed wobbles are now accompanied by my rpms dropping while my jeeps bouncing around, once the jeep is done bouncing around the rpms pick up from where they left off... what could the problem be here?

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post #2 of 7 Old 10-03-2012, 11:06 AM
speedin
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loose wire?
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post #3 of 7 Old 10-03-2012, 11:46 AM
iser
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1997 ZJ 
 
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Location: Fairbanks
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sounds like something is loose. try smacking the pcm and see if rpm changes.

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post #4 of 7 Old 10-03-2012, 05:06 PM
JasonStebbins
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Something sounds loose/getting a bad connection. Check all your sensors and battery terminals/grounds.
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post #5 of 7 Old 10-03-2012, 06:52 PM
ratmonkey
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First, fix the death wobble.
Next fix your battery connections.

'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.

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post #6 of 7 Old 10-03-2012, 06:59 PM
JasonStebbins
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"Death wobble" as it is commonly known as here can be caused by many things. Start by checking both ends of the track bar. The bolt on the axle end can hallow out the hole allowing excess movement, and the ball joint end can fail just like any joint.

Have you checked your wheel bearings? Control arm bushings? Drag link? Upper and lower ball joints? Sway bar bushings/links? The steering stabilizer is not as significant but if it's toasted it will help some.

Report back.
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post #7 of 7 Old 10-03-2012, 07:58 PM
PolkaPower
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1998 ZJ 
 
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Location: The Abyss
Posts: 19,412
Possible fuel pump too.
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death wobble , engine 5.2 , rpm

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