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Discussion Starter · #1 ·
It's a 2004 V8 Touareg with 100k miles.

Getting horrible misfires and they're jumping around to different cylinders + other intermittent codes.

The symptoms are ROUGH idle, and hesitating/shaking under acceleration.

The MIL has never come on in this car. Not ****ing once. But, it illuminates when you turn the key forward. (Almost like previous owner coded the light out?)

Replaced all 8 spark plugs, just ordered 8 new ignition coils.

Hoping the misfires are the coil packs but obviously theres some other stuff going on here.

Pulled codes 2 weeks ago:
1) random/multiple misfire (P0300)
2) misfire cylinder 4 (P0304)
3) misfire cylinder 8 (P0308 )
4) warm up catalyst efficiency below threshold bank 2 (P0431)
5) secondary air injection system insufficient flow bank 1 (P0491)
6) secondary air injection system insufficient flow bank 2 (P0492)
7) 02 Sensor Circuit Slow Response Bank 2 Sensor 1 (P0153)

Pulled codes 1 week ago:
1) random/multiple misfire (P0300)
2) misfire cylinder 2 (P0302)
3) misfire cylinder 3 (P0303)
4) 02 Sensor Circuit Slow Response Bank 2 Sensor 1 (P0153)

Pulled codes tonight:
1) random/multiple misfire (P0300)
2) misfire cylinder 2 (P0302)
3) misfire cylinder 3 (P0303)
4) misfire cylinder 4 (P0304)

Cleared codes. Swapped ignition coils from 2 & 3 with 7 & 8. Drove around the block, then re-ran them:
1) random/multiple misfire (P0300)
2) misfire cylinder 4 (P0304)
3) misfire cylinder 5 (P0305)
4) misfire cylinder 6 (P0206)
5) misfire cylinder 7 (P0307)
6) misfire cylinder 8 (P0308 )
 

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Discussion Starter · #3 ·
Replaced all 8 ignition coils this morning, problem is gone. Car is running better than ever!

Ended up buying direct from dealership for $22/each - updated version 077 905 115 AA

It will be interesting to see if the other codes come back or if they were just a result of the failing coil pack(s).
 

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Discussion Starter · #5 ·
In your did you have a stutter when you try to start it? All the codes you stated are my problems also..did your codes come back?? I need this help because there saying I need new cats and I just passed smog in October.. Please respond before my bank account disappear...lol
What were your codes?
 
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