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spark woes

  • Greg Stephens
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4 months 4 days ago #16421 by Greg Stephens
Greg Stephens created the topic: spark woes
I have no spark on my #3 and #4 top plugs removed coil had it tested showed bad so I replaced it with a new one, still no spark on 3 and 4 top checked all connections and wires found no problems checked trigger coil B3/4 which serves top plugs 3 n 4 with ohm meter checked ok gap is good could electric module be going bad ? Have good spark on all other plugs this is a 97 912 ul need help!

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4 months 4 days ago #16422 by Rob Seaton
Rob Seaton replied the topic: spark woes
1- swap the trigger coil 4-pin connectors. if the problem goes to the other side the trigger is the culprit.
2-swap the A module white wire with B module white wire and see if the problem goes to the 3/4 top plugs. if it does the B module has a failure in one circuit.

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