mjrage

So when I drive my car I have the following problem:

I drive for a while, and then my check engine light will come on and the car will sputter and shake(on acceleration) and just a strange vibration.

If I pull over, turn the car off, and on, the problem goes away till the next time.

The codes are Cylinder 1 / 2 misfiring.

Any ideas what this could be?

HoustonC230

Probably the coils - I've got an '03, but sounds just like the problem I had (and fixed by the dealer replacing #3 and #4 coils).

tyro

Engine problems?

mjrage

No, car runs absolutely strong, zero problems. Accelerates just fine. Then it just happens, turn it off and on, runs fine.

I have replaced the battery and plugs and ran some cleaner through.

mjrage

Replacing the coil packs?

HoustonC230

Yup... Same thing happened to me. It usually happened after I got on the gas a bit - it'd then start misfiring / etc. I'd restart the car, and it'd be fine for a while....

Dealer replaced coil pack #4 first - worked fine for a while, then same problem.

It went back again, and they replaced #3 and #4. No problems since.

mjrage

Sounds great, I have a cylinder misfiring in #1 and #2, so I am going to replace those (just ordfered from the dealer)

Thanks again for the quick responses.

C230 Sport Coup

Throw some new plugs in while yer at it too.
NGK Iridiums are about 6 bucks most places.
If you have a pulley, there's a thread on that other forum about
getting a cooler plug.
And, yes, I had the same problem, and they replaced coil #4.
It got progressively worse till finally it died on a trip and I made it back
on 3 cylinders.
How did you know which cylinders were misfiring?

Outland

Its the coil packs. They are a problem on many models, and for that matter, on many german cars.