Mine was the O2 Simms.. It turned off my SES light and the gas mileage increased. I also picked up a noticeable amount of power. I think it had me running rich. The O2's were still good, I replaced them from front to back, I think the MAC Cats are junk....
Joined: Mon May 28, 2001 7:29 pm Posts: 1175 Location: fairfield, CA
I know for a fact that I don't get anywhere near 340. When I first got my car back and were breaking in the clutch I got about 260 on my first tank. I babied her for the first 400.
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