Rpm drops when i hit a bump. - JeepForum.com
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Unread 10-03-2012, 10:07 AM   #1
duhkooter
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1994 ZJ 
 
Join Date: Sep 2012
Location: agawam, Ma
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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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Unread 10-03-2012, 11:06 AM   #2
speedin
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loose wire?
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Unread 10-03-2012, 11:46 AM   #3
iser
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1997 ZJ 
 
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sounds like something is loose. try smacking the pcm and see if rpm changes.
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Unread 10-03-2012, 05:06 PM   #4
JasonStebbins
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Something sounds loose/getting a bad connection. Check all your sensors and battery terminals/grounds.
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Unread 10-03-2012, 06:52 PM   #5
ratmonkey
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First, fix the death wobble.
Next fix your battery connections.
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Unread 10-03-2012, 06:59 PM   #6
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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Unread 10-03-2012, 07:58 PM   #7
PolkaPower
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Possible fuel pump too.
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