S4 B7 typ 8ED - misfire
Posted: Fri Nov 24, 2023 10:36 pm
Please Help!
I bought an S4 B7 typ 8ED a few months ago, love it!
I'm not great with cars, but always wanted a RS or S4 Avant.
2 months in it started to misfire.
I took it to a Volkswagen Audi Specialist who...
"check for misfire. Activate self diagnosis (seven faults stored).
Erase fault codes and live data.
Showing misfire on cylinders 1 and 2.
Removed plugs and check compressions, cyl 1 135 psi, 2 140 psi, 3 125 psi, 4 140 psi.
Swap coils 1 to 3 and plugs 2 to 4.
Still showing misfire on cylinder 1 & 2.
Supply and fit cylinders 1 and 2 injector.
Replace other 6 injector 'O' rings.
Still showing misfire on 1 & 2"
They did say they it was on a hunch changing the injectors and may not fix, but £828 later, no change.
They said try an Audi forum as they don't know what the issue is.
So here i am.
Any advice or preferred dealers would be massively appreciated. I'm near Tonbridge...
Many thanks in advance.
I bought an S4 B7 typ 8ED a few months ago, love it!
I'm not great with cars, but always wanted a RS or S4 Avant.
2 months in it started to misfire.
I took it to a Volkswagen Audi Specialist who...
"check for misfire. Activate self diagnosis (seven faults stored).
Erase fault codes and live data.
Showing misfire on cylinders 1 and 2.
Removed plugs and check compressions, cyl 1 135 psi, 2 140 psi, 3 125 psi, 4 140 psi.
Swap coils 1 to 3 and plugs 2 to 4.
Still showing misfire on cylinder 1 & 2.
Supply and fit cylinders 1 and 2 injector.
Replace other 6 injector 'O' rings.
Still showing misfire on 1 & 2"
They did say they it was on a hunch changing the injectors and may not fix, but £828 later, no change.
They said try an Audi forum as they don't know what the issue is.
So here i am.
Any advice or preferred dealers would be massively appreciated. I'm near Tonbridge...
Many thanks in advance.