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Old January 13th, 2006, 10:14 PM   #1
shawn
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ZJ Stumbling lots

I can't figure out what it may be. This 98 ZJ has the 318. It seems that whenever it is NOT at full operating temp, it stumbles terribly at part throttle, like going 20-50 mph. Feather the gas and it comes back alive, but otherwise rpms drop slow, and looses power, and even starts popping up threw the intake. I replaced the temp sensor, didn't help. It never gives and Engine Light no matter how bad it runs. I did get an SES light and it was the Speed sensor on the tranny, changed that but still didn't have anything to do with the crappy running. Anybody have any ideas? Map sensor maybe? Intake Air Temp sensor? I am at a loss.
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Old January 14th, 2006, 04:02 AM   #2
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sounds like a plugged or jammed EGR valve. could be just a piece of carbon holding it open.
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Old January 14th, 2006, 10:55 AM   #3
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No EGR on this one.
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Old March 6th, 2006, 07:06 PM   #4
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I found my original thread. BTT.
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Old March 6th, 2006, 08:20 PM   #5
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Try the IAC Idle Air Controller....it's infamous. I just had to replace mine because I would gun it and let off.....die

back out of a parking spot let off...die.
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Old March 6th, 2006, 11:53 PM   #6
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Tps?
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Old March 9th, 2006, 10:07 AM   #7
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Shawn, I should have all three of the sensors on the TB out in the barn. I just have to find them. I can get them to you somehow, or you can head out to Dansville this weekend if you feel like going for a drive... I know I have the ones off the 5.9 you can use to see if one makes a difference. It could be a bad O2 sensor maybe?
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Old March 9th, 2006, 10:17 AM   #8
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Thanks man, I'll have to see where Dansville is. I will most likely be heading up to Fenton this weekend if you are up near there.
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