94 wrangler ignition problems - JeepForum.com
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post #1 of 3 Old 05-16-2010, 03:55 PM Thread Starter
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1988 YJ Wrangler 
Join Date: May 2010
Location: fl
Posts: 104
94 wrangler ignition problems

I have a 94 wrangler 4.0. it seems to start fine, but once its warmed up if i let it idle it dies, i replaced the cap rotor and pick up coil, but its still doing it,while im driving it it acts like i turned the key off for 3 or 4 seconds and then it continues to run, ive ran it with a fuel pressure gauge on it and it doesnt seem to be a fuel problem which is why i changed the pick up cap and rotor. has anyone else had this problem or do you have an opinion on what i should check next.

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post #2 of 3 Old 05-16-2010, 04:16 PM
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1994 YJ Wrangler 
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Location: Desert Hills, AZ
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It could be one of two things. IAC (Idle Air Control) or the TPS (thottle position Senor). After that I would check the vacuum lines.

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post #3 of 3 Old 05-16-2010, 08:32 PM
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1989 YJ Wrangler 
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Location: Detroit
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Look in the Faq on checking fault codes. I think you have a bad O2 sensor. Diagnostic Trouble Codes
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