1993 Jeep Cherokee just won't stay running

1993 JEEP CHEROKEE
165,000 MILES • 6 CYL • 4WD • AUTOMATIC
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HATMAN55
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use this vehicle on hunting lease. started to just die while driving. changed the porcelin relay on fender wall & seemed to cure for a while but came back & got worse. replaced distributor, thought it was the pick-up, nope. replaced coil, plug wires, plugs, rotar & dist. cap, nope. replaced computor brain, nope. just replaced the ignition switch, nope. checked ground & all relays seem to be in tact. crankshaft sensor is new also HELP
Feb 2, 2010 at 12:30 PM
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JDL
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Thanks for the donation. Will the vehicle start and run? If you have spark everywhere, all the spark plugs, use a gage and check fuel pressure. Are there any trouble-codes? You should be able to get some mil codes by cycling the ignition switch. You turn key till dash lites come on, no further. Cycle the key, on--off, on--off, on--off, on, then the mil starts flashing. You count the flashes to get the codes. Your looking for two digit codes.
Feb 2, 2010 at 1:55 PM
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HATMAN55
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[quote:d6fd6691c1="jdl123"]Thanks for the donation. Will the vehicle start and run? If you have spark everywhere, all the spark plugs, use a gage and check fuel pressure. Are there any trouble-codes? You should be able to get some mil codes by cycling the ignition switch. You turn key till dash lites come on, no further. Cycle the key, on--off, on--off, on--off, on, then the mil starts flashing. You count the flashes to get the codes. Your looking for two digit codes.[/quote:d6fd6691c1]Thanks for getting back. it has great fuel pressure at pump & injection line, fuel filter also has been replaced. the truck is 310 miles from my home will try to get the codes my next trip. it will start & idle forever only dies when in motion.
Feb 2, 2010 at 3:05 PM
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JDL
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Did you use a fuel pressure gage? I can't tell good fuel pressure by looking at it. On some makes and models, I've seen injector spray patterns that looked good to me,but, the pressure was half of what it should have been.
Feb 2, 2010 at 3:19 PM