mopar A/F ratio gauae on a 03+ without the mopar o2 sensor

maxq · Post by **maxq** » Sun Jul 15, 2007 5:54 pm

Hi guys,
ok so I have this AF ratio gauge but I do not want to buy the extra sensor (it's frikkin 122 buks) ...

I know the sensor takes 0-1V while the signal for A/F for stock O2 sensor is 2.5-5V ...

how do I build an adaptor, and will a resistor-only circuit help?

oklamopar · Post by **oklamopar** » Sun Jul 15, 2007 10:22 pm

you can use a single wire sensor. bosch pt # 12909 or one that fits a 92 dodge shadow(4 Wire). on the shadow sensor hook the signal wire to the black wire and your ground to the grey one. and power to switched ign. dont use the white wires as they are for the heater.
Hope that helps

bone-yard-racing · Post by **bone-yard-racing** » Mon Jul 16, 2007 7:58 am

Just get a narrow band gage ($30-$40) from pep-boys

maxq · Post by **maxq** » Mon Jul 16, 2007 12:19 pm

bone-yard-racing wrote:Just get a narrow band gage ($30-$40) from pep-boys

is there a link to this? please let me know

Jamie · Post by **Jamie** » Mon Jul 16, 2007 12:29 pm

dont waste your money on a narrow band. all its going to do is flash back and fourth really friggin fast, probably faster than any of us could read it and, be really bright and really annoying. just save your money and get the wideband sensor... you will be happier

good luck
J

bone-yard-racing · Post by **bone-yard-racing** » Mon Jul 16, 2007 12:53 pm

I have an apc narrow band ($30 from pep-boys) and it dosent flash much at all except at WOT. I have found that my car is very rich at idle and pretty decent once it warms up. Just go to any parts store in your area that sells performance stuff and you should be able to find one. I would recomend the $40 auto meter one so that you actualy have a # instead of a bar of lights. $122 for a wideband O2 sensor is actualy a bargin.

gilly02le · Post by **gilly02le** » Mon Jul 16, 2007 5:18 pm

narrow-band = 0.1-1.0V
wide-band = 0-5v

wide-band gauges are crucial if you are using them to tune a car, or keep an eye on the A/F of a F/I engine. If you just want a something cool to look at, get the narrow-band, although having been there and done that with the cheaper of the two options, i will tell ya its good for nothing more then a seizure inducing light show while driving at night. i quickly swapped it out with a voltmeter, until i could afford an AEM UEGo

Post by **Canada** » Mon Jul 16, 2007 6:25 pm

FYI he doesn't need to go buy a narrow band, as his Mopar A/F gauge is narrowband.

It will work w/o the Mopar kit but it will not give a very specific reading.

gilly02le · Post by **gilly02le** » Mon Jul 16, 2007 6:28 pm

yea i know, he said hes got one, i was just stating the difference between narrow and wide-band.. And yea, it will basically just tell you lean, rich, or stoichiometric, He's obviously not using it for tuning, so he'll be just fine with the narrow..

maxq · Post by **maxq** » Mon Jul 16, 2007 7:30 pm

EclecticBlue wrote:FYI he doesn't need to go buy a narrow band, as his Mopar A/F gauge is narrowband.

It will work w/o the Mopar kit but it will not give a very specific reading.

Actually the readout sticks on the last LED since the voltage is always greater than 1

The output of the O2 sensor is 2.5v to 5v which is very wierd...

BlackRoseRacing · Post by **BlackRoseRacing** » Tue Jul 17, 2007 5:49 am

The "Ricer Flash" A/F gauges are fine for basic monitoring....
When the gauge is flashing back and forth, that typically means your running Stoich(perfect A/F ratio)
You can use any Pre 2002 DCx O2 sensor, you just have to wire it up properly. If you get a single wire O2, its going to be the easiest to install, but you have to wait for the O2 to get upto operating temps before you start getting any accurate readings....

Cbussilver01es · Post by **Cbussilver01es** » Tue Jul 17, 2007 12:46 pm

I have a narrow band, for right now, I dont see why so many ppl get bent outta shape about them, I know when I start on my turbo project Ive got to get a wide-band but for now I just wanted to keep an eye on my A/F because my car was running rich for the longest time, c'mon guys narrow-bands arent THAT bad, as long as you dont plan on tuning your engine.