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
1 answer 1 comment
ANSWER by on 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 on December 17, 2010
I would think timing belt has broken or slipped

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