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Old 06-11-2013, 08:50 PM   #1
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YJ Stall problem

I have a 1994 6 cyl. auto YJ which has an intermittent engine cut-out problem.
It starts just fine, runs for 3-4 miles and quits. No sign of life for 5 minutes or so, and then it starts up as if nothing had happened - and runs all day without a problem. It seems to be related to the engine warming up from cold. Any suggestions?
Ian

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Old 06-12-2013, 03:26 AM   #2
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Sounds like a sensor issue. I had a similar problem. I swapped a handfull of sensors and it fixed itself for good. Changed TPS, O2 sensor, crankshaft position sensor and MAP sensor. Also removed and thoroughly cleaned throttle body. Thousands of miles later and she's running like a champ. Don't know which was the fix. Just figured it wouldn't hurt to start freshening up. And it worked. Also make sure your engine grounds are tight . Looks to me that once you heat up enough something frees up and let's you go. Good luck.

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Old 06-12-2013, 03:27 AM   #3
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Also if your gonna do any of tis work disconnect the battery while changing sensors. Good luck.
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Old 06-12-2013, 06:26 PM   #4
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Thanks - I'll go the sensor route. Appreciate your feedback!
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Old 06-12-2013, 08:02 PM   #5
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I'd start with the crankshaft position sensor. Been hearing that causing a lot of that type of problem.
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Old 08-17-2013, 08:34 PM   #6
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I changed all four of the sensors - one by one - and the last one fixed it, which happened to be the Crank Position sensor. Should have gone there first!

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