No spark after changing engine

shermtorshermtor Member Posts: 6
edited May 2015 in Chrysler
what do i have to check
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  • shermtorshermtor Member Posts: 6
    does the crank shaft knock sensor cause a no spark condition
  • shermtorshermtor Member Posts: 6
    edited May 2015
    no power at fuse
  • thecardoc3thecardoc3 Member Posts: 5,839
    Which fuse? Can you connect a scan tool and get any trouble codes or data? Is anything else missing such as fuel pressure or injector pulse?
  • shermtorshermtor Member Posts: 6
    fuel pressure is good. no power at ignition coil fuse. 20 amp fuse.
  • shermtorshermtor Member Posts: 6
    i pulled the fuse box out to check the wiring and all looks good
  • shermtorshermtor Member Posts: 6
    the fuse is good
  • thecardoc3thecardoc3 Member Posts: 5,839
    The ASD relay provides power to the ignition fuses. The PCM turns the relay on when it see's the engine cranking and checks the crankshaft position sensor signal against the camshaft sensor signal to make sure that the engine is mechanically in time. Due to changes in the pick-up signals, an engine with a cam or crank signal profiles that don't match the original ones can cause no-spark, as well as anything that causes the signals to not properly reach the PCM.

    A scan tool would help right now to see if the system is generating any trouble codes.
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