wishmaster22

Light won't come on in either position.

mt_goat

Is it just the light or does it not go in and out of overdrive either?

^VooDoo^

Dont wait for a CEL from a bad o2 sensor, Mine went out almost 3mo ago and no CEL and nothing about it pulling the codes myself, I went throught everything to find out why I was get such crappy power and 8mpg.
Read on the net how they work, Went to autozone picked one up and whalla its back to normal.

wishmaster22

Not sure, How can u tell if you are in overdrive?

mt_goat

Get going about 60mph and hit the button, when it drops out of OD the rpms will go up.

williemon

You should be running around 2500 rpm in OD at 60 and around 3500 to 4000 out of OD.

scrid

But make damn sure your at operationg temperature or the overdrive will be locked out and wont shift one way or another. The light will still go on and off but it won't do anything else. I thought I had a problem with mine all the sudden but I found out the engine wasn't getting warm enough with the beginning of winter season and had to slip a piece of cardboard in front of the radiator. Now it warms right up and shifts fine, and I don't have to fix anything.

suprathepeg

You're all wrong the truck has a VAFM, jeese get it straight (jk).

mt_goat

Yeah actually if you want to get it really really really straight the FSM calls it a VAF.
http://personal.utulsa.edu/~nathan-b...92volumeai.pdf

What does (jk) mean?

suprathepeg

Just kidding

mt_goat

Oh I was thinking something like that.

highway74

How many o2 sensors does a non CA 3.0 have? I thought I only had one on the exhaust after the cat, which I changed. I did o2, cap, rotors, wires, plugs, air filter, fuel filter with maybe a 1mpg gain. Just did the TPS. All oem parts, I guess they needed to be done, but what waste of money for no real gain. Truck has 105,000.

mt_goat

Mine only had one before the cat. (93, non-Ca.)

itsmeagain5789

does the california and the non california give you the same gas mileage?
o yeah, and voo doo, what do you consider "normal" gas mileage?

suprathepeg

IIRC the purpose of the cali setup is to throw a CEL when your Cat is toast.

itsmeagain5789

wishmaster, did changing your o2 sensor work for you? if they did, which ones did you change?