Hey dudes,
I have an 91' Rebuilt M20b25 going into a 87' 325e chassis. I have re-pinned the C101 and have ran wires to accommodate the C104 needs...I believe I wired this up right but i am getting the following issues...
Upon first start up, the engine would crank for days but not fire up. I proceeded to check if i had spark at the plugs... That checked out FINE!
Next, i checked for fuel..I removed the return line from the FPR, and bridged the fuel pump relay (pins 30 and 86 if im not mistaken), and Fuel gushed out no problem, so i have fuel at the rail.
I didnt know if the pump was kicking on during cranking, so I had someone sit in the car and crank while i bridged the fuel pump relay...Still no start.
I disconnected the injector harness, and proceeded to see if I had 12v power to the harness....there is nothing.
The question is, should i be seeing 12v constantly at the injector wiring harness? Or Is it switched, so that when I crank, the injectors get power? What tells the injectors to fire? From my understanding, I thought the CPS sent a signal to the DME which controls spark and fuel distribution? If thats true, how am i only getting spark, but no fuel?
PLEASE HELP!!
I have an 91' Rebuilt M20b25 going into a 87' 325e chassis. I have re-pinned the C101 and have ran wires to accommodate the C104 needs...I believe I wired this up right but i am getting the following issues...
Upon first start up, the engine would crank for days but not fire up. I proceeded to check if i had spark at the plugs... That checked out FINE!
Next, i checked for fuel..I removed the return line from the FPR, and bridged the fuel pump relay (pins 30 and 86 if im not mistaken), and Fuel gushed out no problem, so i have fuel at the rail.
I didnt know if the pump was kicking on during cranking, so I had someone sit in the car and crank while i bridged the fuel pump relay...Still no start.
I disconnected the injector harness, and proceeded to see if I had 12v power to the harness....there is nothing.
The question is, should i be seeing 12v constantly at the injector wiring harness? Or Is it switched, so that when I crank, the injectors get power? What tells the injectors to fire? From my understanding, I thought the CPS sent a signal to the DME which controls spark and fuel distribution? If thats true, how am i only getting spark, but no fuel?
PLEASE HELP!!
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