Ok, the car I had on Saturday was a '92 Buick Skylark. 3300 engine, 103,704 miles. Idle surge hot from 650 to 1100 rpm.

The problem was:

-Never tuned- plug gaps were around 80 thousandths. -Clogged pcv. -O2 ranged 300-450mv. -injector pulse width 4.6-5.0mv... Login to read more.