hey everybody i was just wondering about an air/fuel guage is it suppose to tell you if you are running rich or lean ??i feel dumm for asking this but i really dont know . . but if anybody can tell me what its for that would be cool . . thanks for checking out my post

 

anybody?/

 

A typical A/F gauge that has a light that swings back and forth from rich to lean will mostly tell you if an O2 sensor is dying (the gauge will swing slower, or stop). I doubt you can make a finer call on whether the car's running rich or lean.

But I've never owned one, so I may not be the best judge....

Dave

 

thanks for the reply

 

I have one.

the gauges is pretty much a "light show" as describe by many others who have the gauge. Like Dave said, it basically tells u the quality of the readouts of ur 02 sims. Unless u plan on running an wideband 02 on the car for tuning purposes, the guage isn't very useful. I have a scanmaster now, and that gives me O2 readings for the left and right back O2 sims, and the air/fuel ratio gauge only does one.

It is pretty much no indication of how rich/lean ur car is running unfortunately.

 

yea . . want something to tell me if im running rich or lean for tuning reasons .. im about to install a supercharger . . .what other guages should i need besides the (boost)?????oyea will the scanmaster work for a 94??where can i get one and for how much???where can i get a scanner for odb1

 

I have a 94, and yes that Scanmaster works, and quite well

You can get one for a good price at www.speedinc.com Those fellas were nice enough to match the group purchase price that was going around on the board so that i could get one without waiting for shipping. U can also see some scanners there too.

I would look into maybe a knock gauge if ur going with a supercharger, also a fuel pressure gauge would be VERY helpful, seeing that not even a scanmaster will be able to read that.

 

ScanMaster is a scanner for OBD-I, but it will only work (read codes) on LT1 F-Bodys 94 and 95.

Any scanner, or an A/F gauge will use your stock, narrow-band O2 sensors to get a reading. They simply are not accurate enough for "tuning", particularly with something as critical as an S/C setup. Tuning needs to be done with a wide-band O2 sensor. There is now one available for as little as $360 (they used to be over $1,000).

If you have your car tuned on a dyno, they will typically use a wide-band sensor. You can sort of "calibrate" your stock O2 sensors by watching what they read, compared to the wide-band. That will not make them any more accurate, but will give you a VERY ROUGH guide as to where the stock sensors should read at WOT. But they aren't intended to be used at the A/F ratios you need for max power and torque. They are way too sensitive to operating temperature.

 

thanks you guys imma check out those scanners