'99 A6 2.8 Avant: runs like $h!+ after battery change
#1
'99 A6 2.8 Avant: runs like $h!+ after battery change
AARRRGGHH!
So I changed the battery and washed out the battery bay (pretty carefully).
Car starts but barely, runs rough and sometimes quits at idle.
Foot on throttle, car intermittently cycles around 1500-2000 rpm.
I can rev it higher past that point and it seems to run fine, but once it hits the lower rpm's again, I'm dead.
First thought: Water somewhere.
Course of action: Get compressed air to all the spark plug valleys (dry!) and all electrical connections on the firewall.
Same.
Second thought: Bad Vacuum.
Action: Replaced all the dried-out hose on top of TB & by solenoids.
Same.
Third thought: Still water somewhere.
Action: Drove the car (even though it ran like crap & engine light on) to get it warm & let set.
Same.
4th thought: Bad plugs or wires.
Action: Replaced stocker NGK plugs with the NGK Iridiums.
All plugs had normal wear (but were still pretty worn), but #4 smelled of raw gas.
Conclusion: No spark to #4.
Result: SAME! @#$ %&!!
5th thou...oh, screw it. I'll post to the forums to see if I can't get some help over here.
Any thoughts? Anybody got an extra old spark plug wire lying around to send to AZ so I can see if I may need a new coil pack, or could I still have some water somewhere that's fouling the signal to the coil?
Thanks, Audi Bretheren.
So I changed the battery and washed out the battery bay (pretty carefully).
Car starts but barely, runs rough and sometimes quits at idle.
Foot on throttle, car intermittently cycles around 1500-2000 rpm.
I can rev it higher past that point and it seems to run fine, but once it hits the lower rpm's again, I'm dead.
First thought: Water somewhere.
Course of action: Get compressed air to all the spark plug valleys (dry!) and all electrical connections on the firewall.
Same.
Second thought: Bad Vacuum.
Action: Replaced all the dried-out hose on top of TB & by solenoids.
Same.
Third thought: Still water somewhere.
Action: Drove the car (even though it ran like crap & engine light on) to get it warm & let set.
Same.
4th thought: Bad plugs or wires.
Action: Replaced stocker NGK plugs with the NGK Iridiums.
All plugs had normal wear (but were still pretty worn), but #4 smelled of raw gas.
Conclusion: No spark to #4.
Result: SAME! @#$ %&!!
5th thou...oh, screw it. I'll post to the forums to see if I can't get some help over here.
Any thoughts? Anybody got an extra old spark plug wire lying around to send to AZ so I can see if I may need a new coil pack, or could I still have some water somewhere that's fouling the signal to the coil?
Thanks, Audi Bretheren.
#3
Once you changed the battery, did you recalibrate the throttle body? Disconnect the battery. Sit for a few minutes, reconnect, then turn your key to the ignition point without starting the car. Wait a few minutes for the car to go through the throttle body alignment. Then restart.
I think 99 had electronic throttle, but not sure...
I think 99 had electronic throttle, but not sure...
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