random missfire code
random missfire code I have a 2002 2500hd Silverado and I get a random miss fire code usually when i am on a level road and not under any strain. The motor runs smooth and no signs of an actual miss fire or rough running engine. There is no vacuum leak either. I am thinking it is a bad sensor. But unsure as to which one. Any help would be appreciated!
Thanks
Thanks
Random Misfire Code I had this problem with my 2000 Z28 as well. I tried fuel pump, ECM, O2 sensors all with no effect. All recommended possible fixes.
What did fix the issue was the front knock sensor. Mine had gotten water in under the rubber grommet and corroded the knock sensor. Common problem from what I have read afterwards.
You have to take the intake off but after replacing the knock sensor(s) add some RTV on the edge of the grommets to seal it even better. No problems since.
A good GM Tech with the right scan tool can tell you for sure and save you the trial and error I went through.
Good luck!
What did fix the issue was the front knock sensor. Mine had gotten water in under the rubber grommet and corroded the knock sensor. Common problem from what I have read afterwards.
You have to take the intake off but after replacing the knock sensor(s) add some RTV on the edge of the grommets to seal it even better. No problems since.
A good GM Tech with the right scan tool can tell you for sure and save you the trial and error I went through.
Good luck!
