2004 Jeep Grand Cherokee Power Loss Issue - JeepForum.com
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post #1 of 3 Old 09-28-2021, 05:47 PM Thread Starter
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2004 Jeep Grand Cherokee Power Loss Issue

I was driving my 2004 Jeep Grand Cherokee in the mountains. Everything was fine until I got over a pass and started coasting downhill around 70-80 mph. The gauges then started flickering between actual and zero (rpm, speed, fuel) and the engine seemed to lurch, rev, and sputter, and the battery started to die. One time I lost power, including power steering. I was able to make it home by taking it slow (40-50 mph) going downhill. The car is fine going the same speeds on flat or uphill ground when I am engaging the gas pedal, it seemed to only happen when I am not engaging the gas and coasting going downhill. Any ideas?

Ideas from research I have done indicate possibly a crankshaft position sensor issue, failure in the catalytic converter that blocks the exhaust while going downhill, or a computer issue...

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post #2 of 3 Old 09-28-2021, 06:15 PM
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2014 JK Wrangler 
Join Date: Oct 2017
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scan for codes - yes even if CEL is off.
Check fuel pressure - post PSI.

The battery issue - check alt - be sure to check diodes.

When I see the price of OEM I think aftermarket.
When I see the quality of aftermarket I think OEM.
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post #3 of 3 Old 09-29-2021, 05:49 PM
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Location: Aroostook County
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It always sounds like a battery connection issue to me when the gauges start acting up.
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