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Old 12-07-2013, 05:45 PM   #1
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Question Please HELP-Jeep Wrangler Tachometer goes CRAZY

Jeep Wrangler, 2003, 130,000+ miles: When I drive for more than 20 minutes, turn off, get out to an run errand, get in and start back up, I have these issues-it won't turn over right away and once I get going, say I am doing 50 miles per hour- the tachometer just drops to 0 - car still moving - then it wil go all the way up to 4 or 5 - a few seconds later everything normal. Check engine light goes on one day- out the next day and back on the next - WTF? Please help me! is it my computer? my speed sensor?? help me please! All started a week after an oitl change/tire rotation and a day after I got my car washed- coincidence?

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Old 12-07-2013, 05:51 PM   #2
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Not sure what the fix is but I move your thread to the TJ Tech area so some folks with your same model Wrangler can chime in.


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Old 12-07-2013, 06:15 PM   #3
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It could be a few things, but did the car wash by chance include spraying out the engine compartment?

My first thought is water got into a connector and is causing an intermittent short.
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Old 12-09-2013, 02:58 PM   #4
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Could be you're crank position sensor
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Old 12-09-2013, 03:01 PM   #5
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Could also be a wire or connector for the crank sensor
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Old 12-09-2013, 05:11 PM   #6
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When that happened to me it turned out to be my gauge cluster losing connectivity. The next time it happens, push really hard on your gauge cluster and see if it goes away. If it does, you'll need to pull the cluster, clean the connections, and put some dielectric grease on them. I was lazy and just tweaked the connectors a little to make better contact.

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