Tuning=Low maf's, high o2s

[ThikStik]

Hello,
While running 93 octane, 17 psi, and pit bull, or a chip which came with car-maybe a Ramcharger, and a low 36 line off fp, im getting maf's of 215-230 and o2s of 850-930. The double pumper stages in at 12 psi but even with it disconnected my o2's are high. I cant get more boost because KR is already 2-4* , is that too much? Im thinking its a chip issue but the pit bull was made for my current .oo9's. If maf was going out and reading low it wouldnt matter in terms of injection because WOT just follows chips parameters? Right or wrong? Or does ecm use maf along with tps to determine wot? The o2s look good in all other driving scenarios and mileage and drive is good. By the way, is the pit bull dangerous because of higher timing? Is it Jim Testa chip time?
These readings (here come the flames) were from an Auto Xray 240. Sorry for so many questions.

 

[bruce]

Originally posted by rick cain
Hello,
While running 93 octane, 17 psi, and pit bull, or a chip which came with car-maybe a Ramcharger, and a low 36 line off fp, im getting maf's of 215-230 and o2s of 850-930. The double pumper stages in at 12 psi but even with it disconnected my o2's are high. I cant get more boost because KR is already 2-4* , is that too much? Im thinking its a chip issue but the pit bull was made for my current .oo9's. If maf was going out and reading low it wouldnt matter in terms of injection because WOT just follows chips parameters? Right or wrong? Or does ecm use maf along with tps to determine wot? The o2s look good in all other driving scenarios and mileage and drive is good. By the way, is the pit bull dangerous because of higher timing? Is it Jim Testa chip time?
These readings (here come the flames) were from an Auto Xray 240. Sorry for so many questions.

Some calibrations/proms, only read to 220 or so. Your MAF atta glance is OK, O2s are not written in stone. What is good for someone is no quarantee that they are for you. 2-4 ain't great but not enough to panic over.
Get a contemporary chip. Probably take buying 1-2-3 to find one that likes your car, best.

 

[Rayk]

I didn't understand if your KR reading was at 12 PSI boost or 17 PSI. If it was at 17 PSI then there is no problem. If at 12 PSI then I'd take that high timing pit bull out in favor of a lower timing chip. As for your O2 readings, are they in 3rd gear at high speed?

 

[Turbojorge]

When I first bought my car, it came with a pitbull chip. I never had a scanmaster while the chip was their so I had no clue what was happening. Well, 11 months later, I spun two bearings tuning the car with a new chip. I got me a scanmaster and decided to try the pitbull chip again. I had xylene in the car, 18psi, and the KR went up to 13.3* when I got on it!!!!

Never again!


Those chips have like 25*of timing I think!!

Definatly Jim Testa Time dude.

 

[ThikStik]

Yes Rayk, the o2's are at 3rd and actually anytime at wot. The KR is at the 17-18 PSI. A freind said there was black exhaust smoke when I was stalling up at 4 psi or so. A fuel press gauge i have agrees with my rail mounted one. Anyone suspect the MAF. I guess any stock MAF is suspicious! Should I just get translater plus and reduce timing of Pit Bull, yes? I wonder what effect that would have on high o2's.
Thanks