1993 GT with fresh 393w build, A9L w/moates quaterhorse. Dropped the motor in about a month ago car ran real strong, put about 100mi. on it and started to get tach jumping and high rpm miss/breaking up.
While trying to diagnose got up to 4k, started running rough and died had to get a tow home.
Couldn't get car to start so I started going through Joel5.0s no start EFI check list and this is what I found.
Spark is good.
Fuel pressure/pump is good.
12vdc at red wire on injectors.
NO injector pulse, used a test light jumpered between harness pins.
I also can NOT retrieve any KOEO codes.
I'm thinking my ECU may be fried, I opened it but nothing seems obvious, suggestions appreciated.
While trying to diagnose got up to 4k, started running rough and died had to get a tow home.
Couldn't get car to start so I started going through Joel5.0s no start EFI check list and this is what I found.
Spark is good.
Fuel pressure/pump is good.
12vdc at red wire on injectors.
NO injector pulse, used a test light jumpered between harness pins.
I also can NOT retrieve any KOEO codes.
I'm thinking my ECU may be fried, I opened it but nothing seems obvious, suggestions appreciated.