I know your pain. Have the same problem. Been working on it for 3 months, has nothing to do with smog pump. Car runs excellent in open loop, as soon as closed loop problems start. Even with this annoyance for normal driving my car runs 12.01 consistantly with 1.90 60 foot times on drag radials. Wish I knew the answer. I have had several so called experts look at it, but no fix yet yet.
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