jeep wont start! HELP!!
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Year: 1991
Model: Cherokee
Engine: 4.0
jeep wont start! HELP!!
i have a 1993 jeep grand cherokee, the jeep will start after sitting overnight but after i take it to the store and go to fire it up to go home itll start for a second and shut off and wont fire up again. now i know i have a bad O2 senosr, i have the new one and im putting it in this thursday, my question is if youve had a bad O2 sensor for so long, wouldnt it cause the jeep to load up with fuel and flood it and it wouldnt let me start it warm or cold for an extended amount of time right? the grand is my only mode of transportation and i just would like to know if it should be okay after the O2 sensor is replaced or if i need to get something else too possibly. thanks for your guy's time and help.
#2
If it has a crankshaft position sensor it could be working intermittently. My cps drove me crazy cause it was bi polar, so one day i pulled it and the wire were showing and shorting out when they touched.
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Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
My 90 started all sorts of ruckus. The whole works. It would hesitate, miss, pop back out the intake. (the confetti blowing out the grille is how I found the mouse nest in the air cleaner). No start a few times. Run like a (frightened) ape if you floored it, but stumble on even throttle. Or run fine for days. Found that most of the usual suspects all seemed to be about $50 each, and some are a ***** to change. I didn’t want to just throw money I didn’t have at it, so I just did normal tune up stuff. Odd symptom (you may or may not have). Could start and run all day , no problem. Turn it off for 2 minutes then “the tantrums”. The sitting business really had me. Oil dripping around the CPS sensor, engine heat migrating to the coil or TPS or something? Something involving the manifolds and a vacuum leak? Catalytic converter. Had to be heat migrating while it was off. It took over a year to figure out that the heat shield over the manifolds was expanding into the injector wires at the front.
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Year: 1996
Model: Cherokee
Engine: 4.0
Originally Posted by 91armygreenXJ
i have a 1993 jeep grand cherokee, the jeep will start after sitting overnight but after i take it to the store and go to fire it up to go home itll start for a second and shut off and wont fire up again. now i know i have a bad O2 senosr, i have the new one and im putting it in this thursday, my question is if youve had a bad O2 sensor for so long, wouldnt it cause the jeep to load up with fuel and flood it and it wouldnt let me start it warm or cold for an extended amount of time right? the grand is my only mode of transportation and i just would like to know if it should be okay after the O2 sensor is replaced or if i need to get something else too possibly. thanks for your guy's time and help.
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Year: 1990
Model: Cherokee
Engine: The venerable 4.0
Originally Posted by DFlintstone
My 90 started all sorts of ruckus. The whole works. It would hesitate, miss, pop back out the intake. (the confetti blowing out the grille is how I found the mouse nest in the air cleaner). No start a few times. Run like a (frightened) ape if you floored it, but stumble on even throttle. Or run fine for days. Found that most of the usual suspects all seemed to be about $50 each, and some are a ***** to change. I didn’t want to just throw money I didn’t have at it, so I just did normal tune up stuff. Odd symptom (you may or may not have). Could start and run all day , no problem. Turn it off for 2 minutes then “the tantrums”. The sitting business really had me. Oil dripping around the CPS sensor, engine heat migrating to the coil or TPS or something? Something involving the manifolds and a vacuum leak? Catalytic converter. Had to be heat migrating while it was off. It took over a year to figure out that the heat shield over the manifolds was expanding into the injector wires at the front.
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Year: 90,84
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NO! Guess I didn't make myself clear. I FOUND that the heat shield was expanding as it absorbed heat while parked! Then I would come out of the store, start it then have the problems. It was pushing, ever so slightly into the bottom of the gang of injector wires coming over the front. Took forever to find, 30 seconds to fix! (starting, running, normally it would not get as hot with the air-flow)
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Year: 1990
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Engine: The venerable 4.0
Originally Posted by DFlintstone
NO! Guess I didn't make myself clear. I FOUND that the heat shield was expanding as it absorbed heat while parked! Then I would come out of the store, start it then have the problems. It was pushing, ever so slightly into the bottom of the gang of injector wires coming over the front. Took forever to find, 30 seconds to fix! (starting, running, normally it would not get as hot with the air-flow)
Last edited by Slick761; 08-24-2011 at 11:32 AM.
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Year: 90,84
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I do confess to being puzzled bu the white stuff blasting out of the front!
The CPS was years ago, so you sort of hit it.
OK army green, I said my bit, I'll "but out" of your thread
The CPS was years ago, so you sort of hit it.
OK army green, I said my bit, I'll "but out" of your thread
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