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Jeep Grand Cherokee engine cutting out
I have a 1994 Jeep Grand Cherokee with 80K miles. (4L six) I am having intermittent problems with the engine cutting out for about 5 seconds occasionally. I have replaced the ignition coil, distributor cap, rotor button, and spark plugs. Does anyone have any ideas what this problem may be?
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Befor you entertain replacing computer control moduals or fuel pumps, install a fuel pres. gage on the fuel rail & tape it to a windshield so it can be monitored while failure is occurring.
I can not count the number of times I have found this type of problem to be caused by a bad ground or connection.
If you told a mechanic about this ether-only starting, and he replaced your plugs and wires, that was a waste of money, he should have known better. The fuel pump was a good guess, however.
Check the fuel filters and fuel relay circuits. Also, there may be a SECOND filter somewhere that you don't know about...perhaps one of those ribbon type that sit in the gas tank? Sorry, it's been a while since I've worked on one of these.
This problem occured in two different instances about 3 months apart. The first time, the dealership told me the idler speed control motor was going bad. They replaced it and everything was fine. The second time I took it in for the same problem, they knew they had replaced the idler speed control motor and they asked if I had to have the Jeep jumped. I did and the problem began occuring about 4 days later. It turns out that by jumping the Jeep from another computer controlled car, I had inadvertentaly messed up the setting in my Jeep's computer. It was a simple thing for them to reload the proper settings and off I went. They didn't even charge me. It perplexed me a bit, because the first time the incident had occured, the Jeep had not been jumped, the problem occurred on it's own. But now, It's been six months no and I have had no problems whatsoever. Needless to say, I'm careful about making sure that everything is turned off when I go backpacking and leave my Jeep for several days at a time.