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Old 03-12-2011, 11:54 AM   #1
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'93 wrangler problem, help im stumped.

alright, so ive got a 1993 wrangler 4 cylinder and ive got a problem i cant figure out, hopefully you guys who know a lot more will be able to diagnose it. whats been happening is that after driving it for 5-10 minutes it dies on me, it starts squeaking (like as if from a belt, which doesnt happen at the beginning) and then in stead of idling at 1000rpm it idles at around 2000rpm and then when i try and put it in 1st/put a load on the engine it dies on me. also when it gets to that point when i step on the gas it doesnt get it right away, it sputters and then revs high. when it dies or i turn it off, i cant start it again for a while (maybe a couple hours) but after waiting awhile it starts up just fine, but then i have the same problem after driving it for 10minutes or so.
we have replaced the fuel pump and the fuel filter. we have new spark plugs and wires. it has a new distributor rotor and cap, and it also has a new power control module. i also believe the battery and the catalytic converter are new within the last couple years. we thought it might be condensation in the gas tank, we put Seafoam in it and that helped a little for a short time but didnt fix anything. could it be like a faulty fuel pump/filter sensor?? i dont know.
thanks a ton,
-Chad

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Old 03-12-2011, 12:00 PM   #2
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Correct me if I am wrong but it sounds like a vacuum problem after it warms up and goes into closed loop control.

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Old 03-12-2011, 12:09 PM   #3
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I would Check the vacuum hoses for sure since you only have like 5 or 6 of them.

It could also be a bad Temp sensor There is one for Air one for coolant.

The PCM is connected to the Automatic Idle speed Module, so it is probably reading something that is out of whack and trying to compensate. Or going into Open loop as stated above.
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Old 03-12-2011, 01:00 PM   #4
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thanks guys, how would i go about checking that stuff and knowing if thats the problem or not?
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Old 03-12-2011, 01:15 PM   #5
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Try taking some starting fluid and spraying each vacuum line with it while its running. If you spray a line and you hear the idle rev up in rpms, then you know you have a cracked or leaking line. This is the method I always use.
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Old 03-12-2011, 06:13 PM   #6
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good possibility you have a vacumm leak from the maifiold, sheck to make shure all the bolts, nuts and washers are there.
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Old 03-13-2011, 04:21 PM   #7
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Quote:
Originally Posted by SCOOPYS-YJ View Post
good possibility you have a vacumm leak from the maifiold, sheck to make shure all the bolts, nuts and washers are there.
x-2 on that, if it takes a few minutes to start then it might be a crack in the intake.

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