C5Steve
CCCUK Member
Looking for a bit of advice based on others more extensive experience.
Over the weekend I had cause to remove and then refit the fuel rail. My first time doing this, the car had no issue with the fuel rail I just needed more space for another job. Once I refitted the rail, the car started straight away as normal however it had a clear misfire. Here's the process I went through:
Over the weekend I had cause to remove and then refit the fuel rail. My first time doing this, the car had no issue with the fuel rail I just needed more space for another job. Once I refitted the rail, the car started straight away as normal however it had a clear misfire. Here's the process I went through:
- Shut off the engine and checked the codes - Car had a P0300 code. I know whilst this is for a misfire on multiple cylinders, it can also relate to just one cylinder if it exceeds the maximum number of events (I think that's right).
- Restarted the car and as I assumed this would be related to the injectors I went around and unplugged them one by one. Only one cylinder made no difference to the running of the car suggesting this was the cylinder with an issue.
- Removed the fuel rail again and checked all the seals etc. Injectors themselves appeared very clean (car is always run on V-power), no obvious issues. Refitted the rail ensuring everything seated correctly. Reconnected everything.
- Cleared the codes and restarted. Misfire still there, went around with a NOID tester and checked each plug to ensure the wiring wasn't the issue. All plugs showed they were receiving a signal, again only the same cylinder had no effect when being disconnected on the idle.
- Switched off and checked the codes again, still P0300 but also P0200 after the slightly longer run. Cleared the codes and restarted again.
- Still misfiring, allowed the car to run a bit and gave the car a little throttle to raise the revs. Idle almost immediately smoothed out. Let it run, few more revs, no issues or CELs or codes.