einnod17

As previously discussed, I had all six coil packs replaced due to all six misfies, supposedly. Engine misfired again yesterday, so there must have been something else wrong. Would a cam position sensor cause a mis fire? It only seems to happen when i am driving hard. Could it be as simple as some bad plugs or anything? I have 112k on the car now.

BONFIRE074

i would start there, cheap enough to do and not too hard

einnod17

No. When I took it in the car was barely driving. When they replaced the coils, it seemed to be fixed. Now about 3k miles later, here we go again.

BONFIRE074

i would def try doing the spark plugs, then/and/or vag it to find which cyl is misfiring

squidix9

But first I would look for codes before you do anything else. See if it tells you anything.

Some common misfire culprits:

Plugs - and a lot of oil around the outside of them
Wires
Coils
Knock sensors
Engine grounds
POS

4Driver4

Don't forget coolant temp sensor.

squidix9

When monitoring mine I see ir run real rich. Then when the intake air sensor flips it smooths out dramatically. A bit later when the coolant temp trips, the mileage gets a lot better too.

4Driver4

...I start with the coolant temp sensor. Cheap, easy, known for failure, causes havoc without throwing codes.

S4_Cinci (I S'edTFA)

usually swap them and watch the misfires switch cylinders, if you have VAG-COM and can see individual cylinder misfires.

squidix9

That works