A/F Ratio Gauge Connection

SolarYNeon · Post by **SolarYNeon** » Mon Aug 28, 2006 9:29 am

Well I just spent about 8 hours yesterday, wiring and gauging up my car. Unfortunately, I think I hooked up my AF gauge wrong. It forever reads infinately rich.

I tapped into the o2 sensor right before the cat on the begging on the downpipe. I tapped into the black wire, which is the one that connects to the black and green striped wire. Did I tap into the wrong wire? or am I just at the wrong location totally?

daaboots · Post by **daaboots** » Mon Aug 28, 2006 12:46 pm

What year is your Neon??

Sounds like you used a ground wire.

SolarYNeon · Post by **SolarYNeon** » Mon Aug 28, 2006 6:00 pm

its an 04.

gotta fix that one

Post by **Diablo0** » Mon Aug 28, 2006 6:31 pm

Also, 03+ you need a seperate o2 sensor since the 03+ sensors aparently don't work well with a A/F gauge.

daaboots · Post by **daaboots** » Mon Aug 28, 2006 8:39 pm

Diablo0 wrote:Also, 03+ you need a seperate o2 sensor since the 03+ sensors aparently don't work well with a A/F gauge.

PM me for more detail if you want.

BlackRoseRacing · Post by **BlackRoseRacing** » Mon Aug 28, 2006 8:50 pm

Any 03+ needs its own O2 for a gauge, the readings and voltages are completely different.....
You might have hooked it up properly, but the O2 read out is different than an 2002 and lower...

Post by **Diablo0** » Mon Aug 28, 2006 11:34 pm

BlackRoseRacing wrote:Any 03+ needs its own O2 for a gauge, the readings and voltages are completely different.....
You might have hooked it up properly, but the O2 read out is different than an 2002 and lower...

What he said....

Mopar sells a kit thats a tad over $100 to use with an A/F gauge but you can probably scrap one together yourself for much cheaper though you'll still need to have another bung welded into the downpipe.

SolarYNeon · Post by **SolarYNeon** » Tue Aug 29, 2006 2:27 am

awh darnit

Well, looks like the AF gauge is gonna sit dead for a while ahaha.

BlackRoseRacing · Post by **BlackRoseRacing** » Tue Aug 29, 2006 6:39 am

^^^
You can get your hands on any aftermarket O2 to use that gauge...
1 wire O2 - 1 lead for signal but readings are poor until O2 warms up
2 wire O2 - 1 lead for signal, 1 lead for extra ground
3-4 wire O2's - same as above but with a heating element to speed up the O2 warm up process...

The hardest part is the welding of an O2 bung, as for the xtra O2 sensor you probably can get a new aftermarket one for around $30 or get one off an old daytona,spirit,caravan (96-down)...etc..etc..

SolarYNeon · Post by **SolarYNeon** » Tue Aug 29, 2006 7:28 am

hmm how much does it cost to get welded?

daaboots · Post by **daaboots** » Tue Aug 29, 2006 8:42 pm

SolarYNeon wrote:hmm how much does it cost to get welded?

I paid around $35 CAD to have a bung stainless steel tig welded into my down pipe. That price included the bung.

As for the O2 sensor, just get a cheap bosch singe wire sensor with a 0-1 voltage range. Thats what I'm running and it works great.

BlackRoseRacing · Post by **BlackRoseRacing** » Tue Aug 29, 2006 9:17 pm

^^^
There you go, by the time you really start beating on the car it should be up to operating temps anyways, so you dont really need a fancy O2 unless you went the wideband route....