dj98eclipse
Probationary Member
- 6
- 0
- Jun 13, 2014
-
Dixon,
California
Hello dsmtuners,
I am entirely new to the forum and I have a good problem for the detectives on here to see if they can help me out. I have a 1998 Eclipse GS that has a misfire. The code is P0300 Random Misfire and separate codes for misfires on cylinders 1-4. The car definitely does misfire enough that it can be felt/heard by anyone in the car. I have just had the engine rebuilt to stock specifications and all gaskets are new (No oil leaks). The coil pack is new MSD, wires are new MSD, spark plugs are new NGK. All the sensors on the motor have been replaced, the transmission was rebuilt and just about everything else has been either rebuilt or replaced. All of the ignition components were replaced after the misfire started in order to try and fix it, but nothing has changed.
So I guess more to the question and less of the story. I am curious if anyone else has had any issues with the stock computer similar to mine. Also any tips or tricks to diagnosing said misfire would be helpful. I just had the car smog tested (Love California smog requirements) and the car passed all tests with flying colors except the hydrocarbons were just above the limit which caused a fail. Is there any way that a clogged catalytic converter could cause enough backpressure to upset the engine and cause the CEL?
Any help is appreciated!
I am entirely new to the forum and I have a good problem for the detectives on here to see if they can help me out. I have a 1998 Eclipse GS that has a misfire. The code is P0300 Random Misfire and separate codes for misfires on cylinders 1-4. The car definitely does misfire enough that it can be felt/heard by anyone in the car. I have just had the engine rebuilt to stock specifications and all gaskets are new (No oil leaks). The coil pack is new MSD, wires are new MSD, spark plugs are new NGK. All the sensors on the motor have been replaced, the transmission was rebuilt and just about everything else has been either rebuilt or replaced. All of the ignition components were replaced after the misfire started in order to try and fix it, but nothing has changed.
So I guess more to the question and less of the story. I am curious if anyone else has had any issues with the stock computer similar to mine. Also any tips or tricks to diagnosing said misfire would be helpful. I just had the car smog tested (Love California smog requirements) and the car passed all tests with flying colors except the hydrocarbons were just above the limit which caused a fail. Is there any way that a clogged catalytic converter could cause enough backpressure to upset the engine and cause the CEL?
Any help is appreciated!