2002 A6 2.7t bouncing idle, glowing downpipe?
#1
2002 A6 2.7t bouncing idle, glowing downpipe?
My wife's audi has been troublesome lately. Replaced timing belt and ICM's recently and car ran good for a couple of months. Now the car idle bounces up and down when cold and then after 2 minutes it turns to a rough idle with pops and what-not. Changed the MAF today and no change but I noticed that the driver side downpipe area was glowing red after only idling for 4-5 minutes. No driving or reving the engine. Any idea what could be going on here? Car was running good till she started it up in the morning and noticed the idle problem.
#2
So, thought maybe one of the new ICM's went bad so I replaced each one with one I knew was good and no change. Car has all new plugs and coilpacks installed about 4 months ago. Please say this doesn't have to do with the timing belt. I do NOT want to go through that again.
I don't hear a vacuum leak but could that be a possibility?
Anyone in central FL with a vag-com?
I don't hear a vacuum leak but could that be a possibility?
Anyone in central FL with a vag-com?
#6
It is also possible that the cams jumped one tooth on the hot side and the exhaust valves are opening too soon. I would double check the t-belt timing. Get this fixed quick or you may kill the turbo on that side.
#8
OP: Do you have a CEL on the dash?
#9
So I bought a Vag-Com. Here's the readout..
9 Faults Found:
16805 - Warm Up Catalyst; Bank 1
P0421 - 35-10 - Efficiency Below Threshold - Intermittent
17972 - Throttle Actuator (J338)
P1564 - 35-10 - Under-Voltage during Basic Setting - Intermittent
16487 - Mass Air Flow Sensor (G70)
P0103 - 35-00 - Signal too High
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 35-00 -
16688 - Cylinder 4
P0304 - 35-00 - Misfire Detected
16690 - Cylinder 6
P0306 - 35-00 - Misfire Detected
16689 - Cylinder 5
P0305 - 35-00 - Misfire Detected
17978 - Engine Start Blocked by Immobilizer
P1570 - 35-10 - - Intermittent
16686 - Cylinder 2
P0302 - 35-00 - Misfire Detected
Readiness: 0000 0000
9 Faults Found:
16805 - Warm Up Catalyst; Bank 1
P0421 - 35-10 - Efficiency Below Threshold - Intermittent
17972 - Throttle Actuator (J338)
P1564 - 35-10 - Under-Voltage during Basic Setting - Intermittent
16487 - Mass Air Flow Sensor (G70)
P0103 - 35-00 - Signal too High
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 35-00 -
16688 - Cylinder 4
P0304 - 35-00 - Misfire Detected
16690 - Cylinder 6
P0306 - 35-00 - Misfire Detected
16689 - Cylinder 5
P0305 - 35-00 - Misfire Detected
17978 - Engine Start Blocked by Immobilizer
P1570 - 35-10 - - Intermittent
16686 - Cylinder 2
P0302 - 35-00 - Misfire Detected
Readiness: 0000 0000