Friday, April 16th, 2021 AT 10:02 PM
Engine codes multiple cylinder misfire. Cylinders 2, 4, 6 plugs are carbon fouled. Tested primary coils okay. Did a cylinder drop down test 135 firing 246 not I think due to carbon filed plugs. Other codes were AIT input too high. I believe the other one had to do with throttle air sensor or something idle air sensor maybe. The only thing I can see is a cracked valve cover vent tube that's supposed to be about a half inch ID and it's patched together with a piece of quarter inch fuel line so it's restricted. I don't know if this has a bearing on anything. When the car is running all coils are getting a voltage pulse to fire. Going to test reference voltage of the AIT and check it for functioning. Any other ideas would be greatly appreciated. Engine will not rev over 4,000 RPMs and then follows the plugs installs after several times.










