air/fuel ratio gauge... - Toyota Tundra Forums : Tundra Solutions Forum

tacomatrdsport2591 · #1 (**permalink**) 10-13-2007, 12:14 PM

I know there are alot of variables from engine to engine, but can anyone give me a general idea of how difficult it would be to install an air/fuel ratio gauge in my 87 corolla with the 4age engine? =] thanks!

Eddie · #2 (**permalink**) 10-14-2007, 11:23 AM

A narrowband or wideband A/F gauge?

A narrowband uses a normal O2 sensor,you can tap the signal wire in your pre-existing sensor,there also may be an output you can tap into from the diagnostic port under the hood.

A wideband gauge requires its own sensor and costs more. Most widebands have additional outputs (like a narrowband 0-1volt signal)s o you can replace your existing O2 with the wideband and use the gauge output for your ECU's O2 sensor signal input.

Mr. Creosote · #3 (**permalink**) 10-14-2007, 02:03 PM

I would go straight for the wideband, especially if performance tuning is the purpose. Normal O2 sensors are almost useless at heavy engine loads. They only work accurately when the air fuel ratio is near stoichiometric (14.7 to 1) which is not what the mixture should be at or near full throttle.

tacomatrdsport2591 · #4 (**permalink**) 10-14-2007, 07:43 PM

Thanks so much for the input guys! Now that I have an idea of what to do, this seems like a fairly quick, no-problem add on. The O2 sensor in this car is exceptionally easy to get to...and my main goal in getting a gauge is actually to help myself with shifting efficiency and to see how my car is breathing. Narrow band sounds acceptable, but I am thinking I would probably lean towards wide-band. Do you guys have an suggestions or tips on where to go to find a good deal? Thanks once again, I appreciate it.

mc71454 · #5 (**permalink**) 10-20-2007, 11:36 PM

Quote:

Originally Posted by tacomatrdsport2591

Thanks so much for the input guys! Now that I have an idea of what to do, this seems like a fairly quick, no-problem add on. The O2 sensor in this car is exceptionally easy to get to...and my main goal in getting a gauge is actually to help myself with shifting efficiency and to see how my car is breathing. Narrow band sounds acceptable, but I am thinking I would probably lean towards wide-band. Do you guys have an suggestions or tips on where to go to find a good deal? Thanks once again, I appreciate it.

Don't just lean toward the wideband only get a wideband.

The narrow band is useless for tuning. I use the F.A.S.T. system with dual widebands in my race cars. For a goof I tried a narrow band to see if I could any useful data..sold it on Fleabay a week later.