JohnelP

It's trembling when starts after a humid night, or rain. It trembles both at idle and acceleration. It does that for 5 minutes, then, after a short heat, it works normal.

The MIL light blinks for couple of minutes and remaines ON.

I checked the spark plugs and the and they seem to look fine. I checked the conectors to the coils and the amplifier and they were dry.

I've seen a coil was changed and I heard (previous owner) the amplifier was changed as well. How can I check this?

Silver Streakin'

VAG it for codes. probably the amplifier.

Im@wesome~ out!

is this with ac on or off ?

BMORE_Ken

You really need to get the VAG codes. After that if it says one cyclinder is misfiring or multiple misfires, play musical coil packs.

If its cylinder 2 then its most likely your ICM. Mine went out a few months ago. I used this <a href="https://forums.audiworld.com/a4/msgs/1594531.phtml" target="_new">write up</a> to test mine. I tested volts instead of OHMs and was able to see that the right amount of volts were not getting through to the cylinder 2. Search, there is a lot out there. If it is your ICM buy a Huco aftermarket for like $150 instead of paying $400 for a bosch one that will probably break down the line again.

Ken

JohnelP

a/c is off all the time