General Jack

iTrader: (4)

My car has lost 0.5 and 5 mph in the quarter. Plugs are clean but gas mileage is down, I suspect a bad o2 sensor.

Is there anyway to check this with autotap? I have cleaned my o2 sensors with a propane torch, but I don't think that helped. Couldn't quite get the voltage test to work either. Just hoping I can verfiy bad o2s before shelling out the $$ for new ones.

Mods include LT headers with ORY & 230/227/112 cam. Its been in for 12,000 miles and over a year.

Thanks in advance.

RUDY@AP-ENGINEERING

Not shure about auto tap. If you have access to ls1 edit it will show how fast or slow your 02 sensors are responding on a graph.

General Jack

iTrader: (4)

ATAP will show how fast/slow they are switching between rich and lean, I believe. Is there a benchmark for how fast healthy o2 sensors should switch?

jimmyblue

iTrader: (11)

At idle it's very variable and I expect the headers may
be putting them right to sleep. You'd like them to be
switching at least once a second, more is better. The
older & grimier they get, the more they like the heat.

If you're going to buy new ones, buy the 'vette rears.