pdyoung796

I was cruising around today and i noticed at times my wideband readings breaking into the 9's and this was no where near any WOT. Is this normal or do i need some part throttle roll on tuning ?

FFDP

iTrader: (2)

How old in the sensor?

If it has more than 30-40k miles on it, I would change it out for sure.

Are all cat converter and rear o2 sensor tests along with Cat Over Temp (COT) disabled in the tune?

pdyoung796

The wide band has about 7000 miles on it, not sure about the cat over time being disable. Just seems like the part throttle roll on goes rich, this is were the meth on light is on showing that it's activated and starting to spray.

BigKID

iTrader: (5)

How many pounds of boost when meth is activated and wide band shows 9's? Throttle position is likely irrelevant.

pdyoung796

Around 5 lbs of boost. Does the meth effect the wideband reading just like gasoline? Is it possible the meth coming on is making A/F readings go that rich or is it in the gasoline tuning at the spot ?

FFDP

iTrader: (2)

Yes, meth will make the wideband read much richer than just straight gasoline.

Depending on how much is used will determine how much richer it went. Like if it was tuned for 11.5 afr in boost and you added some meth it could down too 10.0-10.5 pretty easy. That is where a tuner would adjust the tune for the added meth.

pdyoung796

Ok thanks, that is what I was kind of thinking, like I needed some fueling removed from the tune around that spot. WOT at full 10lbs of boost everything is good and where it supposed to be.

turbotruck2007

If it is running good and not breaking up or acting funny when those numbers happen I would leave it alone ...
Pulling fuel in the tune because of meth is scary to me ... Meth quits for some reason , pistons quit for that reason.
JMO