Constant fuel but no spark

1998 DODGE TRUCK
106,194 MILES • 5.9L • V8 • 4WD • AUTOMATIC
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CHRIS GOULD
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  • 11 POSTS
My truck has constant fuel with the key on but no spark. I have changed crank sensor, cam sensor, cap and rotor, coil. Checked all grounds and fuses, still nothing. Has no power to the coil. Please help. thanks in advance.
Aug 10, 2017 at 3:18 PM
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STRAILER
  • ✓ASE Certified Mechanic
  • 54,832 POSTS
  • ASE Certified Mechanic
Hello,

It sounds like the ASD relay has gone bad. Here is a guide that will help us confirm the problem.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Please let us know what you find.

Cheers, Ken

Aug 14, 2017 at 9:36 AM
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CHRIS GOULD
  • MEMBER
  • 11 POSTS
Have checked all fuses & relays & grounds multiple times. Still no change
Aug 14, 2017 at 9:46 PM
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STRAILER
  • ✓ASE Certified Mechanic
  • 54,832 POSTS
  • ASE Certified Mechanic
Lets try reading the codes to see what comes up. This will let us know if we are missing anything obvious.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Please let us know what you find.

Cheers, Ken
Aug 16, 2017 at 10:44 AM
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CHRIS GOULD
  • MEMBER
  • 11 POSTS
Have hooked a few scanners up, unable to read anything. Through error
Aug 19, 2017 at 10:01 AM
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STRAILER
  • ✓ASE Certified Mechanic
  • 54,832 POSTS
  • ASE Certified Mechanic
Yep it sounds like the PCM is gone and needs to be replaced.

Here is its location, I would get a used one so its plug and play.

Please let us know what happens.

Cheers, Ken
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Aug 19, 2017 at 10:58 AM
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