tbfirebird

okay im thinking about getting an o2 gauge but i hear that its not worth it with our sensor cuz there to slow is this true.also how do i hook it up did a search but nobody is really clear on what to do.thanks in advance.

dankhound

An a/f guauge will work just fine with you o2. You just splice a wire from the o2. The only problem with the gauge is it wont be very accurated because we dont have a wideband o2 in our car.

83_1/2 L69

Our cars use the same type of zirconium dioxide O2 sensor that is used in most cars. It is a “narrow band” sensor that works fast enough. The problem with them is that the signal output is “non-linear” with respect to A:F. They are really only good for telling you if the A:F is RICHER then 14.7 to 1 or LEANER then 14.7 to 1. The correct name for those cheap A:F gauges is “rich/lean gauge”

The slow cycling from rich to lean and back is caused by the slow speed of the ECMs in our cars as they are actually controlling the A:F in closed loop mode.

There are a few “lean burn engine” cars on the road and some very expensive aftermarket fuel injection computers that use a more complex “Wide Band” O2 sensor (UEGO) that can correctly detect A:F from 10 to1 all the way up past 20 to 1.
There are also aftermarket wide band gauges that come with an extra, wide band sensor that you install in another exhaust bung. They cost a few hundred dollars.