Wont fire on plugs

[Paradise pontoon]

Hello i have been working hard on a 3.0L mercruiser with HEI distributor. Had it running to set valves, installed everything back now no ignition! Purple wire going to coil is 12 volts with key on and cracking. White/ Green wire is 12 volts to distributor. Distributor is ground to engine good, module to distributor is also has a good ground. I installed new electronic module, new pickup coil , new coil, new rotor, new cap , new spark plug wires ( ohmmeter wires out) check good, new spark plugs, checked over and over connections,disconnected the tach wire, what im I missing?! Coil has good ground. Battery has 14.5 volts plenty of voltage. Replaced all battery cables positive and negative. Cleaned ground area. TIA

 

[Scott06]

Hello i have been working hard on a 3.0L mercruiser with HEI distributor. Had it running to set valves, installed everything back now no ignition! Purple wire going to coil is 12 volts with key on and cracking. White/ Green wire is 12 volts to distributor. Distributor is ground to engine good, module to distributor is also has a good ground. I installed new electronic module, new pickup coil , new coil, new rotor, new cap , new spark plug wires ( ohmmeter wires out) check good, new spark plugs, checked over and over connections,disconnected the tach wire, what im I missing?! Coil has good ground. Battery has 14.5 volts plenty of voltage. Replaced all battery cables positive and negative. Cleaned ground area. TIA

Have you disconnected the shift interrupt switch ? If it is tripped it will kill spark. Disco it and test

 

[Paradise pontoon]

Have you disconnected the shift interrupt switch ? If it is tripped it will kill spark. Disco it and test

Yes its by passed

 

[Paradise pontoon]

Yes its by passed

Does anyone know on the voltage rating on all the wires? I know the purple wire is 12 volt. But does the white and yellow wire have a resistor in the wire? Wiring diagram doesn’t show any type of grounded wire.

 

[alldodge]

Which 3.0 do you have
You mention Wht/Grn wire so I'm thinking TB4 or 5

 

[Scott06]

Which 3.0 do you have
You mention Wht/Grn wire so I'm thinking TB4 or 5

I dont think 3.0 s used TB , I believe they were all delco est in recent years, DDIS or points before that

 

[Scott06]

Yes its by passed

When you say it was by passed you mean disconnected or did you connect the wires together Or jumper it out

attached is a wiring diagram for a 3.0 with a delco est , which is what I assume you meant by HEI igntion. If by chance you have an aftermarket HEI, will need to know what you have to help

 

[Paradise pontoon]

When you say it was by passed you mean disconnected or did you connect the wires together Or jumper it out

attached is a wiring diagram for a 3.0 with a delco est , which is what I assume you meant by HEI igntion. If by chance you have an aftermarket HEI, will need to know what you have to help

Yes I contacted the two wires together. Its oem HEI . Just don’t understand,it’s simple system.

 

[Paradise pontoon]

When you say it was by passed you mean disconnected or did you connect the wires together Or jumper it out

attached is a wiring diagram for a 3.0 with a delco est , which is what I assume you meant by HEI igntion. If by chance you have an aftermarket HEI, will need to know what you have to help

Yes that is the system i have

 

[Scott06]

Yes I contacted the two wires together. It’s oem HEI . Just don’t understand,it’s simple system.

JustDisconnect the wires when connected together it will supply the 12 v to kill the igntion

 

[Paradise pontoon]

JustDisconnect the wires when connected together it will supply the 12 v to kill the igntion

Good morning, ok i have disconnected the purple wire and white wire. Still no spark. Put another new module on this morning with another new rotor. Still nothing!! Im getting parts from part store they probably fit a car engine would that make any difference? I see all the time other people say it works the same

 

[Paradise pontoon]

Purple wire should be the only power going to the coil? Correct? Unless you have a tach and gray wire will be hot.