Question about 1994 Jeep Grand Cherokee

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94 Cherokee won't start

My 94 Jeep Cherokee Sport 4.0 straight six was running fine. Parked it at night, and the next morning, it would crank, but wouldn't start.

Thought it was fuel, since no gas smell at the tailpipe after cranking, but there is pressure at the fuel rail, so I don't think it is that.

Pulled ignition lead: no spark (screwdriver near grounded metal method).

Pulled low voltage connector at ignition coil: 12 volts at black wire, no volts at green, with ignition on. When cranking, voltage at green wire only goes up to .1 or .2 volts.

All of the fuses and relays appear to be fine, but if you have a test that requires testing them in a certain state or method, by all means lets retest.

Any ideas?

Posted by Joel Rutledge on

  • Joel Rutledge
    Joel Rutledge Aug 18, 2008

    It was the crank position sensor. Thanks~!

  • jendanyk Feb 23, 2009

    pulled over and turned off the ignition, and when i tried to start it up again a minute or two later it wouldnt start. thought it was fuel, then i thought the battery was dead so we ried to jump it. Just a faint little wuuuuuuumph sound when i try to start it. Power seems to be failing. electronics were working but they are starting to fade. I know nothing about cars, how long should the car giving the juice idle before i try to start it again?(jump starting)



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Ronnie Houston

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Check the ecm and the crankshaft positioning sensor both will keep it from firing

Posted on Aug 18, 2008


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