Mechanics

WHY IS MY STALLING ?

1989 Jeep Cherokee • 230 miles

I have a 89 cherokee Laredo 4.0L. My jeep stalls 99% of the time when it gets around 210f by the guage. 1% when cold. It does not matter if its at idle, speeding up or slowing down. I had a dealer check it. They claim it lost fuel pressure and was low to begin with.I replaced the pump & strainer per dealer and no change at all. I have replaced the MAP, ICM, cap & rotor, plugs, Crank sensor, and a broken pre-heater hose. Still stalls. About a year earlier I replace the serpentine belt but I was running fine before and after that. I drove it in a couple miles on a broke belt but it did not have time to get hot before it got home. It seems to be related to the engine temp more than anything. If it cuts off I can crank the engine and after a few tries it starts and will run till it gets about the same temp again. It may take a 2-15 mins but it wil restart. Its got the old AMC computer in it and to be honest I dont think any of the several mechanics or the dealer may be reading any codes. I cleaned the Idle control and no change. What could cause these symptoms at Idle, while speeding up, and slowing down? From my own work around transformers I am starting to think maybe a sensor or the coil. I have seen coils (non-auto) that would work get till they ran awile then stop working for a few seconds to a minute or a hour then work again. This might account for when I tested it a few time it was getting spark to the plugs right after the stall. Up till this started the jeep ran great. Thanks for any help you can give.
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Wolf101
May 10, 2012.




WANNA READ THE CODES?

I MAY NOT BE MUCH HELP WITH ANYTHING ELSE

I WILL SEND YOU A PRIVATE MESSAGE

CLICK ON YOUR NAME AT THE TOP OF THE PAGE---LOOK LEFT FOR MESSAGES

THE MEDIC

Tiny
CJ MEDEVAC
May 10, 2012.
I would have to have the meter to read the codes and its the old AMC computer so I cant even find a hand held unit that will read the codes. If I could get one of course it would be better and as for the article I already started there. If you know where I can get a hand held unit I dont mind buying it. There is no check engine light on either. If you have a answer leave it here. I can add that since I put the pre-heater hose on the other day it seems to run rougher. It did not do that before I replaced it and yes I checked for plug wires and vacumme leaks that might have happened as a result of this.I still dont believe its got anything to do with it since the stalling was first. My question is more of which of the items listed under STALLS would cause my 89 jeep cherokee to stall with your foot on the gas, at idle and when slowing down. Would all the items listed in stalls do this under all 3 conditions while the engine is hot 99% and 1% when cold and cause a hard start condition especially on a cold start from setting for a day? If I can get a answer to that I can find which item on the list is more likely to be the cause. Also again will a failing coil cut out from time to time like most transformers do as they begin to go bad rather than just dieing out right? Thanks

Tiny
Wolf101
May 10, 2012.
ONCE AGAIN

GO TO THE TOP OF THIS PAGE

CLICK ON YOUR USERNAME

WHEN THE PAGE POPS UP--LOOK FOR MESSAGES (HIGHLIGHTED) ON THE LEFT SIDE

CLICK IN THERE---I LEFT YOU A MESSAGE

EITHER YOU HAVE KNOCKED SOMETHING LOOSE--MAYBE AGGRAVATED A ROTTING VACUUM LINE--OR YOU MAY HAVE A SENSOR PROBLEM

IF YOU'LL REPLY TO MY MESSAGE, I MAY CAN HELP YOU INVESTIGATE THAT DEPARTMENT

YOUR TURN

THE MEDIC
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Tiny
CJ MEDEVAC
May 10, 2012.

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