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Unread 12-23-2003, 07:20 PM   #1
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94 GC 5.2l Runs then sputters and dies

94 GC 5.2l
She will start fine when cold, then sometimes after making say a grocery run after leaving the store the idle will start fluctuating and it will die....

Before all of this I've recently replaced the fuel pump(& filter) and oxygen sensor.

This ones got me stumped; once when it happened I had my meter with me and found there was about +7vdc on the return/negative side (goes back to PCM) on both the throttle pos. & MAP sensors even with the connectors disconnected from these sensors. The only sensors that are connected on this (PCM) circuit are the TPS, MAP, O2 Sen and I think the oil pressure or manifold temp.

Somehow temp related though...?? HELP!

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Unread 12-25-2003, 08:28 PM   #2
Swamp Boy
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1993 ZJ 
Join Date: Jan 2003
Location: New Orleans
Posts: 1,327
Dont know but mine is doing something similar.. On a cold day it will not idle
I have to hold the throttle down till it warms up then it runs fine..
I dont know if there is a choke or something that could go bad.. I am trying to figure this out now..

If I find something out I will let you know..

Just another soccer moms Grocery getter....
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Unread 12-27-2003, 06:41 AM   #3
Texas ZJ1
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1994 ZJ 
Join Date: Mar 2003
Location: Omaha, NE
Posts: 20,102
I had a similar problem about two years ago. I replaced the ignition coil, distributor, wires and sparkplugs and it went away. It would idle no problem then, when I tried to accelerate away, it would sputter and stammer until it finally caught. NOt fun on the entrance ramp on the interstate.

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