no spark new coil have fuel psi is good ing. mod. checks out okay

tried that have no hot spark already done the ohm test on coil swapped out ignition module already checked coil primary and secondary resistance I know I have the EDI system in this 4.3 Vortech I'm just stuck here before my stroke this would have been easy but now I have to learn all over again.

Next 'test' ALL fuses under hood .. Test for battery voltage at coil + with key on AND engine cranking .. If no voltage OR if voltage is ok with key on but not while cranking, suspect ignition switch! .. Also possible failed crankshaft sensor, under front of engine .. You'll get it figured out! .. Keep me posted.

Sorry for not getting back to you sooner. Just put in a new crank sen. Just been checking the wiring I have no 5 volt ref. at crank sen. instead I have 12 volts.

There are 3 wires going to sensor .. 12 volts .. Ground .. 5volt reference .. Find the power and ground wires by testing with volt meter .. The other wire is the 5 volt reference signal *while cranking engine* .. May have to turn crank manually to get a better reading .. with key on .. Probe wire harness connector from backside with it hooked up to sensor while testing.

Thanks for getting back to me pushrod I know I need that 5 volt ref. I know which wire it is but I have 10.48 volts there, now the ground wire is correct and the 12 volt trigger is correct.

Now it gets tricky.. You are going to need a wiring schematic with ECM pin out to check for short to power on 5v signal wire.. I don't have access to that here.

Hi pushrod yep that is what I was afraid of. I to look for that. I wonder if AllData has it?

OH yeah... www.alldatadiy.com .. They do charge a fee but I don't know how much.