Hello members,
This is my first post and I am glad to have found this forum. I hope to learn so much here.
Anyway, here's my problem. I bought this Envoy a few months back from a co-worker. The only DTC on my scanner is P0304.
1. I swapped out the coil from no#4 with different cylinder coils....
2. I replaced the coil with a new one on cylinder #4
3. I replaced the spark plug on cylinder #4
4. I replaced the fuel injector on cylinder #4
still, cylinder #4 is misfiring
I bought a logic probe and have done troubleshooting and I have voltage, a signal and a ground reading on the coil plug connection on #4, and it still misfiring.
I have tested the fuses and relays, and they're all good. I also tested the connection to the PCM (C2) and it checks out good.
I'm not sure where I should go from here, but I was looking online and it says that it's possible that the fuel filter is clogged or needs to be replaced, but I'm not sure if I should do it until I've done all the troubleshooting needed.
Any help is greatly appreciated!
Once again, glad to be here on this forum
afili8ter
This is my first post and I am glad to have found this forum. I hope to learn so much here.
Anyway, here's my problem. I bought this Envoy a few months back from a co-worker. The only DTC on my scanner is P0304.
1. I swapped out the coil from no#4 with different cylinder coils....
2. I replaced the coil with a new one on cylinder #4
3. I replaced the spark plug on cylinder #4
4. I replaced the fuel injector on cylinder #4
still, cylinder #4 is misfiring
I bought a logic probe and have done troubleshooting and I have voltage, a signal and a ground reading on the coil plug connection on #4, and it still misfiring.
I have tested the fuses and relays, and they're all good. I also tested the connection to the PCM (C2) and it checks out good.
I'm not sure where I should go from here, but I was looking online and it says that it's possible that the fuel filter is clogged or needs to be replaced, but I'm not sure if I should do it until I've done all the troubleshooting needed.
Any help is greatly appreciated!
Once again, glad to be here on this forum
afili8ter