Just go aheaed and run it. If they're not there at all, its like they're bad. Cars run all the time with bad o2's... maybe just not too good. I know other people that have mustangs and they don't run o2's at all, on their stock computer, and they're happy with it. They dont seem to think they're loosing preformace (but i think they are). But it runs fine for driving around town, maybe not too good in the 1/4.
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Joe Zemaitis, Grand Rapids Michigan
1991 Mustang GT. Mods to date: 4.10 rear end, new POSI, aluminum driveshaft, AOD w/ shift kit, 2 1/2 off road h-pipe, 2 1/2 flowmasters and 2 1/2 tail pipes. Electric fan, Removed air pump and egr tube. Hotchkins upper and lower control arms. New energy suspension rear busings. Hoosier Quick Time Pro 27x10.5x15 and bolt on subframes soon to be welded. Everything else is STOCK. Totally stock ENGINE. 14.29@96 with 130k miles.
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