I searched and couldnt find anything so deicded to post. I am interested in getting a prosport A/f ratio and voltage gauge but was wondering how would i install the A/f ratio. I know where the guage is going but not much about how to install the reader.

Any help about a/f ratio gauges would be awesome, even if it doesnt involve the prosport one.

Thanks

 

bump

 

Yea i still need help with this.

 

The A/F ratio reads from the O2 ports on the exhaust header, there are two stock O2 sensors, now I don't know if a normal A/F ratio gauge needs to take the place of one of those or not, because I've always looked for wideband A/F gauges which need another bung welded into the header for their sender, sorry but this is the best I can tell you.

 

On my Honda it was a simple tap into a sensor wiring harness... I doubt its much more complicated than that, but I also need to know as I just picked up an AutoMeter A/F gauge today. Help!

BUMP

 

If it taps into a stock O2 sensor, its a useless narrow band gauge. It reads in such a small range, its just another flashy thing to put on your dash.

A wide band O2 sensor needs either a hole drilled in the exhaust or a bung welded on before the cat. It will have a wiring harness that runs to the gauge. These gauges generally read from 8:1-18:1 a/f.

 

http://www.aempower.com/ViewCategory.aspx?CategoryID=70

The gauge you want ^^^

The gauge you DONT want vvv

http://store.summitracing.com/partde...5&autoview=sku

 

This man speaks the truth. If you want pretty flashy lights that tell you nothing the a narrow band will work just fine. But for real time A/F info and the ability to data log that info get something like the AEM. Autometer also makes a new wideband but get ready to pay almost 400 bucks.

 

JustAnotherWideband (JAW) is hands down the best deal, but if you dont want to make a case for it, the AEM is the best alternative.


They can be had new for about $220, or used on eBay for less than $150

 

K so I got the worthless one alright I admit it I didnt do my research. that said, HOW DO I CONNECT IT? there has to be a signal wire somewhere. There must be an O2 sensor somewhere. ANYONE point my in the right direction. Thank you

 

Just put 12V power to it, why bother hooking it up? Its just gonna dance around and cause you to take your eyes of the road!

 

Very Helpful... Thanks, @$$...

 

If anyone is having problems installing an AutoMeter Air Fuel Ratio Gauge, and is sick of being run around the forums and taking ***** from people about the gauge itself, I found this it also includes Boost Gauge Instructions.

http://www.mossmotors.com/graphics/p...ns/100-921.pdf

 

I'm an *** to stop people from wasting money.


You obviously don't give a crap what an air/fuel gauge does, so why bother putting it in?

If your putting in a narrow band a/f gauge, you don't need an a/f gauge to begin with, its mind boggling.






I read the Moss guide, and they are telling you to tap it right off the ECU which is a stupid idea. Tap the white signal wire coming off the O2 sensor on the sensor side of the plug, so if you screw it up, your not replacing the engine harness or doing a lot or unnecessary wiring repairs.

 

Fine, I was just asking for help having already bought one... where is the O2 sensor located. Sorry for the *** comment. I really just wanna get it in, I guess for the light show.

 

Exhaust system. The plug is on the left side of the head between the airbox and the valve cover.

It is 4 wires, sensor side is gray, gray, white and black. Tap that white wire and run that to the (purple I think) on your gauge.

 

Narrow band A/F gauge? I didn't know there was such a thing. It will read like a saw tooth. High/low/high/low, unless on the gas then it's overloaded rich. Won't really tell you much, performance-wise that is.

I don't think anyone is trying to be an ***, but a narrow band A/F gauge is like a two position gas gauge, full/empty. Doesn't help you a whole lot.

 

Its actually gray, white, white, black... so idk. maybe I'm just gonna give up on this tedious, pointless venture

 

Then the gray wire is signal.

Whites are heater and black is ground.


Its been a while since i've needed to go down there.

 

That ended up not working, but whatever thanks for trying I give up.

 

Thanks for all the info guys. Hopefully i can try to get mine connected even tho i now know it is a stupid gauge.

 

Let me know how it goes cuz I couldn't get mine up and running. Theres a way of tapping into the ECU harness, but I've been advised against it and frankly i agree.

 

i added a wideband by simply adding another bung to my header

 

For those of you with a wide band, like the AEM or other. Have you utilized it for a custom tune? Like an RMW custom tuning session?

My recent Jan/RMW tune was performed with just ECU readings, so I guess that would be narrow band only. Would you expect a tune to be more accurate , and therefore better using a wide band for AFR??

 

My guess is there was a tailpipe unit for the dyno tune, so while it was an after cat measurement, there were still wideband readings for your tune. Having a wideband installed just for the tune probably wouldn't have changed the tune at all.

As for running the gauge as a tool, it never hurts to keep an eye on things, especially the harder you flog your car.