miss fire on 2000 Audi A4 Quattro

i have a 2000 a4 1.8t quattro out of no where i lost power and it would not run and the check eng. light was on so i got it scanned and it came up a miss fire on 2, 3, 4 what could be happening to make this miss

by in Leesport, PA on October 29, 2010
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1 answer 1 comment
ANSWER by , October 29, 2010
Its hard to tell without being able to do some basic diagnostic tests. Have you lost spark or fuel to those cylinders? Check for obvious vacuum leaks. A professional grade scan tool read raw sensor data without having to intrusively teat each sensor, I would look at Oxygen sensor reading, fuel trim figures Long and Short term and air flow meter air volume readings.
COMMENT by , December 17, 2010
I would think timing belt has broken or slipped