1996 mercruiser 7.4 efi/mpi NOW NO SPARK
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i had fuel pump vst tank issues and you all helped me fix that now the it has no spark , i checked and redid all the grounds on the motor , check fuses, breaker , when i turn on the key the vst pump comes on like it should but wont start , and i had a new coil i tryed and still no spark any ideas would be helpful, thanks again James
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Not sure if this helps but I have twin 454mag mpi's One wouldn't spark, had pleanty of gas. I spent days tracing wires, swaping ecu's you name it.. A local dealer wanted to install a new wire harness which was big $$. What I started doing was pulling all plugs on the harness. Found one 6 or more wire plug in the very far corner of the dash, hard to get to... I pulled apart cleaned and she fired right up..
It looked fine but just a little corrosion is all it took. Again I spent hrs. checking each connection.
It looked fine but just a little corrosion is all it took. Again I spent hrs. checking each connection.