Car has been misfiring at idle. Had P0300 and P0302. Changed spark plugs, checked the gap, and changed the Coils since it had been a couple years. No change in misfires. moved coils and plugs around with no change.
Took off the IM and removed the carbon build up (was esp bad in cyl. 2) and replaced all 4 injectors with new ones.
Still had P0302. took IM back off and replaced the IM gasket, and double checked all my work.
P0302 gone (yay) but now I have P0303 WTF.
Replaced the PCV valve, and it had def failed, but the P0300 and P0303 remain at idle. Car feels great when driving, but flashing cel and constant misses in cyl 3 at idle.
Compression tested 155 on all cylinders.
I sprayed carb cleaner on all the vacuum hoses and around the manifold, but didn't find any changes in idle.
Cleaned the MAF with no changes.
Removed the TB and cleaned it up, with no change.
I have OBDeleven, but not sure what to look for besides watching the misfires count like crazy when I'm stopped.
Any ideas of what to do next? I'm about to admit defeat and bring it to a dealership. Seems like it could be something simple.
Took off the IM and removed the carbon build up (was esp bad in cyl. 2) and replaced all 4 injectors with new ones.
Still had P0302. took IM back off and replaced the IM gasket, and double checked all my work.
P0302 gone (yay) but now I have P0303 WTF.
Replaced the PCV valve, and it had def failed, but the P0300 and P0303 remain at idle. Car feels great when driving, but flashing cel and constant misses in cyl 3 at idle.
Compression tested 155 on all cylinders.
I sprayed carb cleaner on all the vacuum hoses and around the manifold, but didn't find any changes in idle.
Cleaned the MAF with no changes.
Removed the TB and cleaned it up, with no change.
I have OBDeleven, but not sure what to look for besides watching the misfires count like crazy when I'm stopped.
Any ideas of what to do next? I'm about to admit defeat and bring it to a dealership. Seems like it could be something simple.