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1993 Jeep Cherokee Spark from coil but not at plugs

Tiny
REV4REV
  • MEMBER
  • 1993 JEEP CHEROKEE
  • V8
  • AWD
  • AUTOMATIC
  • 93,000 MILES
I have no spark at spark plugs but when I remove coil wire at dist. Cap and put a plug in it it has great spark. Even open up gap on test plug a long ways and it still sparks from coil. Have replaced crank sensor, PCM, Plugs, Wires, Cap & Rotor to no avail. Timing is on anyone have an idea what to do next? Is it possible the rebuilt PCM is firing coil when rotor is inbetween contacts in cap?
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Sunday, March 2nd, 2008 AT 8:34 PM

3 Replies

Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
Take off the distributor cap and have someone crank it see if the rotor is turning. Let me know what you find.
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Sunday, March 2nd, 2008 AT 8:41 PM
Tiny
REV4REV
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  • 8 POSTS
I tried that also. Rotor turned as engine cranked.
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Monday, March 3rd, 2008 AT 7:59 PM
Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
Put the #1 cylinder at the TDC and then remove the distributor cap and check to see if its at the spot for #1 spark plug, if not it has jumped time.

If thats good you may have a bad ignition module.
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Tuesday, March 4th, 2008 AT 7:16 AM

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