Working on an older Cadillac, 83 Deville, 4.1L.
Had an issue with no 12V to the injectors and have already solved that. We are currently not getting an a Negative pulse. While I haven't dug in to this issue much yet but wanted to maybe check to see if there are some known items to focus on.
Right now:
Fuel Pump is working, proper pressure
12V to both injectors with IGN On
Oil Pressure light works and goes off when running
Fuel injectors are now working but only when a negative trigger is jumped to the injector
I see in the schematic that the oil pressure sending must work to get a pulse and appears to be working. I have not traced the wires back to the ECU yet but that will be the next step.
Does anyone have a flow chart or list of sensors required to obtain the negative pulse aside from the Oil Pressure sending unit?
We just got a fresh battery in the car today so I am not sure if any codes are present yet but hope someone may have some information for me.
Appreciate any feedback you can provide
Had an issue with no 12V to the injectors and have already solved that. We are currently not getting an a Negative pulse. While I haven't dug in to this issue much yet but wanted to maybe check to see if there are some known items to focus on.
Right now:
Fuel Pump is working, proper pressure
12V to both injectors with IGN On
Oil Pressure light works and goes off when running
Fuel injectors are now working but only when a negative trigger is jumped to the injector
I see in the schematic that the oil pressure sending must work to get a pulse and appears to be working. I have not traced the wires back to the ECU yet but that will be the next step.
Does anyone have a flow chart or list of sensors required to obtain the negative pulse aside from the Oil Pressure sending unit?
We just got a fresh battery in the car today so I am not sure if any codes are present yet but hope someone may have some information for me.
Appreciate any feedback you can provide