Need help with ignition problem

[Jambi]

Recently finished an EFI conversion. Engine was turning over but not starting...determined I had a fuel pressure issue. Got the fuel pressure issue resolved. After fixing the fuel pressure, the engine was still turning over but not firing. With key in the "ON" position, probed red coil wire and it was fine. Probed green coil wire and it was fine. However, it was after I probed the green coil wire that the engine was no longer turning over. Fuel pumps still kick on when key is "ON", however when I turn the key to "START"...dead silence. Not sure what changed after probing that green coil wire.

Battery has a full charge. I have a brand new starter solenoid. Starter checked out fine when tested at NAPA this morning. I have a good ground to the EFI harness. No blown fuses. Not sure where else to turn. Help please.

 

[70_Steve]

Fuel pumps still kick on when key is "ON", however when I turn the key to "START"...dead silence. Not sure what changed after probing that green coil wire.

The basic start circuit has nothing to do with the EFI mods, with the possible exception of where you tapped into to get the START wire for the EFI.

The start solenoid is just a relay. Power to the little S terminal, with the base of the solenoid grounded, should energize the coil of the solenoid. See if you have 12 volts on the S terminal with the key to START. Also make sure the mounting base of the solenoid is grounded.

 

[512cadillac]

ignition problem

Not sure if this will help but I am having a similar problem. My new ignition switch would allow me to turn the motor over. Then after addressing another problem I have nothing, found the switch now open in cranking position. Bought another switch it was bad out of the box. Third switch isn't working either. They are all made in Taiwan, has quality gone out the window? I have checked all the wiring which is new, not blowing fuses, and it starts fine if I jumper out the ignition switch. I think the cheap ignition switch is my problem, maybe it will help you out. John