MS2-Misfiring
#30
Just did another quick test to confirm my suspicions...
I connected each injector connector and poked the + end of the 12v tester into each of the unique colored wires for each injector, and they were all getting 12v with the ignition on.
I'm assuming at this point that the issue is somewhere else?
I connected each injector connector and poked the + end of the 12v tester into each of the unique colored wires for each injector, and they were all getting 12v with the ignition on.
I'm assuming at this point that the issue is somewhere else?
#33
So I reassembled everything to how it was when I had the car running right a couple weeks ago.
I started it up, and the misfire was still there, and sounded exactly the same as it did before.
I triple checked the COPs again, and each one had good 12v, ground and signal.
The interesting thing is that if I disconnected the #4 COP connector, the idle stayed exactly the same; but if I unplugged any of the other COP connectors, the motor quickly died.
Edit: Also, if the motor is idling, and I disconnect the #4 injector connector, the idle stays exactly the same as well.
Also, I pulled the fuel rail off and attached each injector to the rail with some wire and plugged each of them in. When I cranked the car, the #4 injector wasn't firing, but the other 3 looked fine.
So I switched injector 3 and 4 to see if it was the injector, and when I cranked the car again, the injector for cylinder 4 was still the only one not firing. So I can safely say at this point that the injectors are all working properly.
I've followed the wiring all the way back to the ECU connector, and all 4 injectors are getting a 12v signal while the car is idling, yet the #4 injector is not firing for some reason.
I started it up, and the misfire was still there, and sounded exactly the same as it did before.
I triple checked the COPs again, and each one had good 12v, ground and signal.
The interesting thing is that if I disconnected the #4 COP connector, the idle stayed exactly the same; but if I unplugged any of the other COP connectors, the motor quickly died.
Edit: Also, if the motor is idling, and I disconnect the #4 injector connector, the idle stays exactly the same as well.
Also, I pulled the fuel rail off and attached each injector to the rail with some wire and plugged each of them in. When I cranked the car, the #4 injector wasn't firing, but the other 3 looked fine.
So I switched injector 3 and 4 to see if it was the injector, and when I cranked the car again, the injector for cylinder 4 was still the only one not firing. So I can safely say at this point that the injectors are all working properly.
I've followed the wiring all the way back to the ECU connector, and all 4 injectors are getting a 12v signal while the car is idling, yet the #4 injector is not firing for some reason.
Last edited by ShadowZ; 07-31-2012 at 09:07 PM.