Need help with afr
08-16-2012, 07:23 PM
#1
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Need help with afr
I bought a narrowband auto meter from a member here and understand how to wire it but do not know what color the PCM signal wire is and what plug it's in under the dash? Any help would be greatly appreciated!!
08-16-2012, 07:44 PM
#3
+1, a narrowband sensor is not going to give you any valuable info. To get accurate readings you need to get a wideband sensor. Narrowbands basically end up being a light show as they will bounce all over the place. As for the PCM wire color I am not sure, I would be careful taping into the PCM wires as you could be asking for trouble.
08-16-2012, 08:39 PM
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I agree with you guys but I don't have a tuner just a mail order black bear and didn't find the need for a wide band yet. the price was right on the gauge couldn't really pass it up
08-16-2012, 09:51 PM
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If you are dead set. Grab a meter and tap into one of the forward (pre-cat) O2 sensors. Fire up the truck and find the wire that carries the correct voltage. I don't know what it is but it won't be 12+ volts it will be very low voltage (less than 1 volt I think). I "think" it is the purple wire but that's kind of a guess. Just tap into that wire and you won't have to guess. Run it into the cab and hook it up. It will be easier than trying to dig through a nest of wires.
Last edited by Boober; 08-16-2012 at 10:02 PM.
08-16-2012, 10:57 PM
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Thanks for beating me up on the Q lol so what's a good wide band then I really like the look of the lc-1 but hear more negatives then positives mostly about some kind of calibrating and either they work or don't, obv plx is nice but a lot of $$ those are really the only 2 I have looked into I know there's plenty more out there, like I said in previous post I don't have a tuner just data log email tuning so I don't really need the best and wildest wide band, but reliability and easy set up and usage would be nice
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08-17-2012, 08:35 PM
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Most wideband kits use the Bosch UEGO sensor. I have heard that the NGK UEGO sensor works well too (if not better) but I don't know from experience. I have an AEM wideband O2 gauge (uses Bosch UEGO) and am pretty happy with it. Most consumer grade kits are not as accurate as the high dollar professional ones but they are good enough for most applications.