P030300 Help!
P030300 misfire in cylinder nr 3. I have checked coil is ok and spark plug is ok, but still the same misfire on cylinder nr 3! Any ideas? think about injector. The car have 100000km
When a cel sets it also captures freeze frame data - look at that for anomalies.
You said spark is ok - don't take this badly but how did you check and verify?
A good scantool can show run data as well as injector pulse width. If you or the shop has an oscilloscope, a relative compression test is quick and easy.
You have to work through the 3 factors needed for complete combustion.






