Diavan

Well, I left the inner light on for a few days (Genious !!). The battery went dead. So I had to jump the car & recharged the battery.
Replaced the spark plugs today with NGK BKR6E's. Gapped at 0.030". Drove it around for a while, felt hiccups on a few occasions. Came back home, vagged & got the following codes.

Can the change of spark plugs cause misfires ???
Car is ASP stg2 chipped.

Address 01 -------------------------------------------------------
Controller: 8D0 907 551 M
Component: 2.7l V6/5VT G 0002
Coding: 06711
Shop #: WSC 13622
7 Faults Found:
16815 - Warm Up Catalyst: Bank 2: Efficiency Below Threshold
P0431 - 35-10 - - - Intermittent
16805 - Warm Up Catalyst: Bank 1: Efficiency Below Threshold
P0421 - 35-10 - - - Intermittent
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 35-10 - - - Intermittent
16687 - Cylinder 3 Misfire Detected
P0303 - 35-10 - - - Intermittent
16690 - Cylinder 6 Misfire Detected
P0306 - 35-10 - - - Intermittent
16686 - Cylinder 2 Misfire Detected
P0302 - 35-10 - - - Intermittent
18010 - Power Supply Terminal 30: Voltage too Low
P1602 - 35-10 - - - Intermittent
Readiness: 0000 0000

Address 03 -------------------------------------------------------
Controller: 8D0 907 389 E
Component: ABS/ESP allrad D46
Coding: 04395
Shop #: WSC 06435
1 Fault Found:
01435 - Brake Pressure Sensor 1 (G201)
35-10 - - - Intermittent

Address 35 -------------------------------------------------------
Controller: 8L0 862 257 N
Component: CV-Pump, Alarm, RC D16
Coding: 16232
Shop #: WSC 12345
2 Faults Found:
01367 - Central Locking Pump Run Time Exceeded (Likely Leak)
35-00 - -
00991 - Interior Lights
28-00 - Short to B+

Address 56 -------------------------------------------------------
Controller: 8D0 035 195 A
Component: Radio D00
Coding: 00110
Shop #: WSC 06435
1 Fault Found:
65535 - Internal Control Module Memory Error
00-00 - -

VR_Life

BTW : Did you torque them to 22 ft.lbs ?

Diavan

But I do think they should be tight enough. You think that could be the problem ... ??

VelocityS4

Check your coilpacks, make sure their all connected and in the right places

JBear::FATS

misfire DTC telling you which cylinder ? That should narrow it down.

Mike2kS4

I've seen factory NGK's with gap ranges from .035 to .030 in the same set, supposedly spec'd at .030.

Anyhow, your problem reeks of bad gappage.

BLK01S4

<UGH> </UGH>

BlackS4tt (Josh)

hmm.. how do you check the gap? could this be the cause of all my misfires? arent they pregapped?

JBear::FATS

Spark plug gap tool, cheap from any auto parts store. I always double check them before installing.

BLK01S4

Yup usually by the register its the size of a one dollar coin.