I fix one for a buddy and he sends me a friend you all help last time lets see if you can do it again.

Ok I have replaced the ECU and the PTU and Ignition coil check out but I still cant get spark. when cranking the PTU wire looses voltage?? So it has to be a sensor not sending the right signal to the ECM any ideas?

Jim

 

There should be 3 "hot" wires at the PTU and the ground. The 3 different wires carry the signal from the ECU to PTU. Each wire controls a coil pack (pair). Are you not getting spark on one pack or are all three not firing?? What year car is it?? I'm assuming it is a DOHC engine. About the only thing that sends signals to the ECU are the MAS and CAS (crank angle sensor).

 

found it the MFI relay was grounding out proble fixed engine runs like a champ.