chip cel help
i just got an apr chip installed today in my 99.5 1.8t , i was loving it for about 25 miles when the cel started flashing and then became steady, and the car started bogging when the throttle was open. i went back to the apr dealer and they told me id blown a coilpack on the 4th cylinder which they'd replaced at my expense. afterwards i drive about 30 feet down the road and the same thing happens again. i come back and they replace a spark plug and put the old coilpack back on, refunding my money. everything is fine after this until about 50 miles and the same problem returns. i dont know the codes that came up on vag-com but ill get them tomorrow if theres still a problem after i replace all the spark plugs to ngk's, but any help would be greatly appreciated, because so far its cost me about $550 to screw up my car