1993 Jeep Cherokee Spark from coil but not at plugs

1993 JEEP CHEROKEE
93,000 MILES • V8 • AWD • AUTOMATIC
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REV4REV
  • MEMBER
  • 8 POSTS
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?
Mar 2, 2008 at 12:34 PM
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BLACKOP555
  • ✓Experienced Mechanic
  • 10,386 POSTS
take off the distributor cap and have someone crank it see if the rotor is turning. let me know what you find.
Mar 2, 2008 at 12:41 PM
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REV4REV
  • MEMBER
  • 8 POSTS
I tried that also. Rotor turned as engine cranked.
Mar 3, 2008 at 11:59 AM
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BLACKOP555
  • ✓Experienced Mechanic
  • 10,386 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.
Mar 3, 2008 at 11:16 PM
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