mateusz1611
9th March, 2016, 08:43 PM
Hello
I have a problem with Audi S4 B5. My friend bought this car few months ago with modified software 1.1bar. Everything was ok about 5 months but 2 weeks ago car started jerking like misfire between 2800 - 5000 rpm. In ecu no faults so i made logs all parameters. Boost specified and actual perfect 1.1 bar, cam shaft regulation ok, lambda rich, injection timing smooth max 23ms. We replaced new MAF, plugs, coils, injectors, DV, but car have big timing retardation, 6 degrees 3000 rpm and 12 degrees 6000 rpm. I read ecu and software looks ok. I made second software with 0.9 bar and problem is but a little less I tried EGT OFF but still the same. So I wrote ori and car is driving normal now, no jerking but still is timing retardation about 7 degrees. I tried third software and car starts jerking when boost achieve 0.85 bar. Car doesn't have catalysts, has bigger IC.The rest of the parts are stock. I don't have idea where is problem. I will be very grateful for any help
I have a problem with Audi S4 B5. My friend bought this car few months ago with modified software 1.1bar. Everything was ok about 5 months but 2 weeks ago car started jerking like misfire between 2800 - 5000 rpm. In ecu no faults so i made logs all parameters. Boost specified and actual perfect 1.1 bar, cam shaft regulation ok, lambda rich, injection timing smooth max 23ms. We replaced new MAF, plugs, coils, injectors, DV, but car have big timing retardation, 6 degrees 3000 rpm and 12 degrees 6000 rpm. I read ecu and software looks ok. I made second software with 0.9 bar and problem is but a little less I tried EGT OFF but still the same. So I wrote ori and car is driving normal now, no jerking but still is timing retardation about 7 degrees. I tried third software and car starts jerking when boost achieve 0.85 bar. Car doesn't have catalysts, has bigger IC.The rest of the parts are stock. I don't have idea where is problem. I will be very grateful for any help