misfiring problems any help out there?
#1
misfiring problems any help out there?
hi guys
i own a 2000 a6 avant 1.8T which has devoloped a misfiring fault. it generally drives on average at 30mph max with my foot to the floor with intermittent bursts of power that last no more than a couple of seconds.
can anyone help me in locating the problem, i can't afford to give it to audi so will try and replace the relevant parts myself once i know what is causing the problem.....
i've had suggestions of the maf filter or coil packs that could be causing this but these were suggested before i done the scan... i was able to arrange a vag-com scan today and this is what come back........
vag com - faults found......
17544 - Fuel Trim: bank 1 (add) system too rich - P1136
17536 - Fuel Trim: bank 1 (mult) system too lean - P1128
16684 - random/multiple cylinder misfirwe detected - P0300
16685 - cylinder 1 misfire detected - P0301
16687 - cylinder 3 misfire detected - P0303
16688 - cylinder 4 misfire detected - P0304
16686 - cylinder 2 misfire detected - P0302
17925 - main relay (j271) electrical malfunction - P1517
18010 - Power Supply Terminal 30: voltage too low - P1602
18034 - Power train Data Bus: missing message from TCU - P1626
17834 - EVAP Purge Valve (n80) open circuit - P1426
i called audi with the details of the main relay fault (17925 - main relay (j271) electrical malfunction - P1517) i thought that replacing this would be as good a place to start but after calling 3 dealers nobody could tell me what relay this is! anyone out there know????
thanks
i own a 2000 a6 avant 1.8T which has devoloped a misfiring fault. it generally drives on average at 30mph max with my foot to the floor with intermittent bursts of power that last no more than a couple of seconds.
can anyone help me in locating the problem, i can't afford to give it to audi so will try and replace the relevant parts myself once i know what is causing the problem.....
i've had suggestions of the maf filter or coil packs that could be causing this but these were suggested before i done the scan... i was able to arrange a vag-com scan today and this is what come back........
vag com - faults found......
17544 - Fuel Trim: bank 1 (add) system too rich - P1136
17536 - Fuel Trim: bank 1 (mult) system too lean - P1128
16684 - random/multiple cylinder misfirwe detected - P0300
16685 - cylinder 1 misfire detected - P0301
16687 - cylinder 3 misfire detected - P0303
16688 - cylinder 4 misfire detected - P0304
16686 - cylinder 2 misfire detected - P0302
17925 - main relay (j271) electrical malfunction - P1517
18010 - Power Supply Terminal 30: voltage too low - P1602
18034 - Power train Data Bus: missing message from TCU - P1626
17834 - EVAP Purge Valve (n80) open circuit - P1426
i called audi with the details of the main relay fault (17925 - main relay (j271) electrical malfunction - P1517) i thought that replacing this would be as good a place to start but after calling 3 dealers nobody could tell me what relay this is! anyone out there know????
thanks
#2
RE: misfiring problems any help out there?
the relay is under the hood there are 3 relays and 6 fuses 2 ate the top and the other 4 at the bottom relay 3 is your counting from left to right, I also agree this is probably the problem for all the other codes as I have checked through my data
#3
RE: misfiring problems any help out there?
wow that reply was quick! thanks!!!!!
i will be so happy if a relay replacement sorts this, i've just been told it could be the ecu!
where abouts under the hood on a 1.8t should i be looking for the relay?
there is nothing obvious when i lift the hood?
thanks
i will be so happy if a relay replacement sorts this, i've just been told it could be the ecu!
where abouts under the hood on a 1.8t should i be looking for the relay?
there is nothing obvious when i lift the hood?
thanks
#6
RE: misfiring problems any help out there?
my a6 is right hand drive (i'm in the UK!)
i still can't see nothing obvious near the windshield! could it be in the same box as the ecu?
i have read somewhere that it is possible vag-com can find this relay in an engine that may not even be in that model of car, could this be the case?
i tried to copy and paste a picture of my engine bay on the forum for a guide but was unable to.
thanks again for the amazingly quick response!!!!!!
i still can't see nothing obvious near the windshield! could it be in the same box as the ecu?
i have read somewhere that it is possible vag-com can find this relay in an engine that may not even be in that model of car, could this be the case?
i tried to copy and paste a picture of my engine bay on the forum for a guide but was unable to.
thanks again for the amazingly quick response!!!!!!