S4 misfire, please help
#1
S4 misfire, please help
My stage 2 2000 s4 is having misfire problems. The code is P0300 (random/multiple misfires). I replaced the spark plugs (gapped to .028) and I just replaced all 6 coilpacks and the problem still persists. The car sputters and doesn't have much power. It throws 4 codes which are as follows:
P1118
Manufacturer Control.
Fuel Air Metering
P0300
Random/Multiple
Cylinder
Misfire Detected
P1114
Manufacturer Control
Fuel Air Metering
P0140
O2 Sensor
CKT No Activity
(Bank 1 Sensor 2)
I'm thinking either MAF or 02 sensors but please give input
Thanks,
Klaus
P1118
Manufacturer Control.
Fuel Air Metering
P0300
Random/Multiple
Cylinder
Misfire Detected
P1114
Manufacturer Control
Fuel Air Metering
P0140
O2 Sensor
CKT No Activity
(Bank 1 Sensor 2)
I'm thinking either MAF or 02 sensors but please give input
Thanks,
Klaus
#3
do the maf.. the o2 code is a catalyst monitoring code and has nothing to do with drivability.. the maf can be reading way off and cause the ecu to command rich or lean, and that will cause a misfire, your p0300 code...you could also have a vacuum leak which could cause a maf code.. id replace the sensor though....
#5
and so what do the plugs have to do with the air fuel metering code?? nothing.. start with the maf.. smaller gap def is better, especially if your running a stage 2 tune..
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