I am helping a friend get his car running that he just purchased midway through a HG job. He has already replaced the ignitor/coil assembly, the distributor, all plugs, wires, cap and rotor.
We have fuel pressure, but it seems the spark is what we are missing. It wont start on ether. We have checked IGF and IGT wiring from the ECU to the Ignitor, but unfortunately we dont have a O-scope to check those signals.
We have verified all wiring from the distributor, ohmed out Ne and both G sensors at the ECU and all wiring is good. He has been over the cam timing several times and we know its ok.
Battery voltage is good, we have checked B1, B, IGN, and BATT to the ECU as well as the Grounds.
The Ignitor case ground is good, and we have tried rotating the distributor every tooth to see if it will help. We have also checked the timing mark on the crankshaft pulley to make sure it hasnt rotated on us.
Compression is good at about 150 psi across the board. I know the ECU will cut fuel after several IGT outputs and no IGF return. When does it resume fuel delivery? After the key is cycled?
If anyone knows what we are missing please let me know!
Thanks!
---------- Post added at 11:53 AM ---------- Previous post was at 11:51 AM ----------
Oh, I forgot there are also no codes
We have fuel pressure, but it seems the spark is what we are missing. It wont start on ether. We have checked IGF and IGT wiring from the ECU to the Ignitor, but unfortunately we dont have a O-scope to check those signals.
We have verified all wiring from the distributor, ohmed out Ne and both G sensors at the ECU and all wiring is good. He has been over the cam timing several times and we know its ok.
Battery voltage is good, we have checked B1, B, IGN, and BATT to the ECU as well as the Grounds.
The Ignitor case ground is good, and we have tried rotating the distributor every tooth to see if it will help. We have also checked the timing mark on the crankshaft pulley to make sure it hasnt rotated on us.
Compression is good at about 150 psi across the board. I know the ECU will cut fuel after several IGT outputs and no IGF return. When does it resume fuel delivery? After the key is cycled?
If anyone knows what we are missing please let me know!
Thanks!
---------- Post added at 11:53 AM ---------- Previous post was at 11:51 AM ----------
Oh, I forgot there are also no codes