Really bad bucking around 3500 RPM

[eliteboi]

Hey guys!

Well go figure, I spend $1575 on my car this week and now I have a really bad bucking. When on the highway, in 5th gear, around 70-80 MPG (3500k rpmish) it hesitated really bad then bucked when I hit the gas to the floor to go around someone. Scared the crap out of me!

Could it be a coil pack? A plug? Or both?

[eliteboi]

PS the c2 software isn't in my car YET

[Smileybug]

What did you recently have done on your car? Have you scanned it with a VAG-COM?

[eliteboi]

I should probably put a little more detail in about what I have done to my car.

I have a KN air filter, which I have taken out and cleaned about a month ago. At that same time I took the MAF next to the airbox out and cleaned it with MAF cleaner

I replaced all four plugs right after I bought the car at around 92k miles, with NGK cooper plugs.

I just had my fuel filter replaced the day before yesterday, and I only run Shell 91 in my car. When I had the oil changed at the dealer a few weeks ago I put a can of BKG cleaner threw it as well.

[eliteboi]

Originally Posted by Smileybug

What did you recently have done on your car? Have you scanned it with a VAG-COM?

I just had all new Bilstein Sports put on, and the fuel filter... *SIGH* the rest of it was Monster Mats, and the C2 software which I am waiting to have flashed on my ecu.

[Manny1987]

Originally Posted by eliteboi

I just had all new Bilstein Sports put on, and the fuel filter... *SIGH* the rest of it was Monster Mats, and the C2 software which I am waiting to have flashed on my ecu.

o2 sensor

[eliteboi]

It was a bad coil pack