Kenny_Kline
Well-known member
Is there a fail safe that would prevent the ECU from providing injector pulse? If not, it may look like I have a bad ECU (injector driver in ECU) but its unlikely considering the ECU just came back from ECMlink today.
Just a quick recap: I get spark (1&4 fire together and 2&3 fire together) so clearly the CAS is working but I tested it anyways and I get power, ground, and 2 5v references output to the ECU and confirmed the signals input into the ECU at the ECU plug so wiring is good. I tested ground pulse at ECU side and ECU is not putting out ground pulse for any injectors. Its either a bad ECU or something is telling the ECU to not pulse the ground but I have no idea what that could be. TPS is working correctly, fuel pump activates correctly, MPI relay tests good.
Just a quick recap: I get spark (1&4 fire together and 2&3 fire together) so clearly the CAS is working but I tested it anyways and I get power, ground, and 2 5v references output to the ECU and confirmed the signals input into the ECU at the ECU plug so wiring is good. I tested ground pulse at ECU side and ECU is not putting out ground pulse for any injectors. Its either a bad ECU or something is telling the ECU to not pulse the ground but I have no idea what that could be. TPS is working correctly, fuel pump activates correctly, MPI relay tests good.