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Not move the oxygen sensor, just replace them. Oxygen sensors are a consumable item.
If you were really motivated, you could move the O2 as close as possible to the manifold, like you see with the imports. (I wouldn't bother)
My friend has a 1999 Camaro with 3800 and auto trans, he said the oxygen sensors were likely original, so they had at least the 80,000 miles he put on them and up to 150,000 on the odometer. After replacing the front O2 sensors he said mileage improved 1 to 2 mpg and there was a lot more get up and go. Defiantly worth the price of the sensors.
And he is a tight wad.
Knocking the junk out of the converter does not seem to do much unless its done to the hardest working, trailer pulling gas trucks out there.
Unless the converter is clogging up with soot or oil ash.
(if it plugs up once, its likely going to do it again)
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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