Contour Enthusiasts Group Archives Forums General General Air/Fuel ratio

I just insalled a air/fuel ratio gauge "Auto meter 5775" and I was wondering were it should read a WOT , I think it has 4 red "Lean",10 yelow "stoich", and 6 green "rich" a total of 20 led indactors.

Also I wanna make sure I got the write wire??
I hooked it to the blue wire.

And What fues is best to hook it into??

It doesn't seem to move to much, it never goes past stoich

When you have it hooked up right, it will bounce back and forth from red to green at idle (once the O2s heat up). It will then peg up to (EDIT)green (somewhere) when you get on it.

Doesn't sound like you have it right. Unfortunately I have no idea what you need to do.

You should hook up the sensor wire to a white or white/red stripe on the Contours. At least that is what Autometer said.

Does any one else have any experiance with these guages????

Any info. whould be helpful, thanks

Hey loco, thanks it worked
At WOT it's max on the rich scale!!
Is that good or bad??

By the way, when I am not accelerating or decelerating it just bounces back and forth from "rich to lean" !!!whats that all about????

Normal operation of the PCM during "closed loop" mode. The O2's will oscillate above and below 0.45 volts (14.7:1, stoich) when the PCM is being most efficient with fuel (and emissions). Mine range from 0.035 V - near 0.8 V, sometimes more when it's doing this. (My S-AFC gives me the exact voltage digitally.)

The O2's on the car are so imprecise at any value away from 0.45 V that as long as a bunch of lights (green) light up at WOT, you are fine. In my car, if I get more than ~0.91 V I foul spark plugs, but other people can run as high as 0.93 or 0.94 fine. You can't really get anything out of the WOT reading with the OEM sensors.

In reality, it makes the A/F meter more bling than functional gauge, but I still think they look cool and want one eventually.