Mechanics

MISFIRING IN 1,3, AND 5

2000 Cadillac Catera

Engine Performance problem
2000 Cadillac Catera 6 cyl Two Wheel Drive Automatic

My serpintine belt just broke and I had it replaced but the mechanic was an idiot and said it was running rough. All he told me was the was misfiring in 1, 3 and 5. What is the problem
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Benglavic
September 21, 2009.



Engine misfiring can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel.

Rasmataz
Sep 22, 2009.
Are we talking serpentine belt or timing belt. A broken serpentine belt would not relate to a misfire, but a timing belt would if valves are bent.

Factoryjack
Sep 22, 2009.