1993 Jeep Cherokee just won't stay running

HATMAN55

MEMBER
1993 JEEP CHEROKEE
6 CYL
4WD
AUTOMATIC
165,000 MILES

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

3 Replies

JDL

MECHANIC
16,098 POSTS

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.

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Tuesday, February 2nd, 2010 AT 1:55 PM

HATMAN55

MEMBER
3 POSTS

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.

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Tuesday, February 2nd, 2010 AT 3:05 PM

JDL

MECHANIC
16,098 POSTS

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.

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Tuesday, February 2nd, 2010 AT 3:19 PM