Just found the forum and looking for a bit of help
My Son has just bought his first car a 2001 1.8 Astra Coupe
He picked it up today and drove it home, about 100 miles, as he got near home the EML light came on
The only thing that played up was the idle, it was very eratic going from 500 to 1000 RPM, apart from that the car still ran sweet.
When he got home I connected my Code reader and it showed 1 code P0302 (Missfire Cylinder 2)
Anyone got any tips on how to fix this, like I said the car runs fine apart from idle.
The only other thing I noticed when the code reader was attached and I was watching the live data was the ignition advance kept changing.
When the idle was fine it was reading 6 to 8 degree's advance and when the idle was eratic it was showing 2 to 20 degree's advance, don't know if it was just the ECU trying to correct the eratic idle by varying the advance or the varying advance producing the eratic idle.
I have changed the plugs but that made no difference
Thanks for any help and hope its not too expensive to fix as the car cost £3K and his insurance cost £1.8k and he has only had it one day.