1995 Pontiac Grand Yesterday Car Driving Completely Fine Suddenly Began Bog

1995 PONTIAC GRAND AM
112,000 MILES
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Yesterday my car was driving completely fine. Then suddenly it began to bog majorly. My idle is very high, about 2 grand. There is a profound engine tick, my exhaust is backfiring, and my acceleration is horrible. I checked the vacuum lines, my car is a quart or two high on oil, and there's no CEL so it cant be a PT sensor. Anyone know what my problem could be?
Jan 23, 2013 at 3:33 PM
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