i took my 06 wagon to get a downpipe welded and i asked the welder if he needed to disconnect the battery he said no . after it was welded driving out i noticed a check engine light. i connected my accessport and found that cylinder misfire in 1 and 3 i reset it and it happens almost every 2 weeks. plus if i hit 11omph i get hard vibrationsin the passenger wheel well.

 

why do you go 110mph? and did you get an after market dp? did you get a cell fix? have you checked your spark plugs or lines from the turbo or any of the vacuum lines?

 

i go 110 for racing.i have a helix downpipe with cel fix but is it possible to burn the cel fix during the downpipe welding? they didnt disconnect the battery. and i only have 17,000 miles so i havent checked plugs but i thought that it might be the plugs so i bought some but havent installed. i dont know if i should mess with it myself or take it to dealership?

 

put your oem stuff back on and go to the dealer to get it check. as far as warranty though... im not sure if you still have any...