eroc022

iTrader: (7)

ok need help with this one big time..... basically why do my oxygen sensors look like this?


this is set number 2 and its doing the same thing.... had it tuned at race proven motorsports in Delaware, they told me my right bank had a bad sensor, so I just replaced both of them, but still acts the same.... its a mutt of a motor, 00 block, 98 top end, heads cam, injectors, yatta yatta.... runs good at WOT but cruising it wants to bog out... has new MAF sensor, running the Vette/LS6 one, fuel pressure is good, spark plugs look good.... any suggestions?

Old Geezer

iTrader: (3)

I'd start w/ some data logs....
A known bad sensor, and it was "tuned" anyway?? Or, were the sensors changed when the tune was done??

LS1TA_956

iTrader: (1)

I have the same problem on my 98 t/a mine stumbles when taking off at wot I checked the cels also my left o2 came out bad

eroc022

iTrader: (7)

Well its basically a stock tune, and at wot its fine only at a cruise speed does it bog and spit, they said replace the pasenger side O2 sensor and it should fix, I just wanted to verify computer wasn't causing problems.... Figured it might have been a prior tune or something causing it.... Holds idle great

eroc022

iTrader: (7)

dont know if this helps any to the guys that know what most of this means but heres some readings ive gotten using a scanner......Can someone help me decipher this ?
MIL: off
ABSLTPS(%): 0.0
RPM: 625-660
CALC LOAD: 4.3%
MAF(lb/m): 1.62-1.63
MAP(Hg): 13.6
COOLANT: 163
IAT: 106
IGN ADV: 10.5-16
STFTRM1(%) -27.3-- -28.1
LTFTRM1 (%) -10.9
STFTRM2 (%) -.8 - 0.0
LTFTRM2 (%) 14.1
FUELSYS1 CLSD
FUELSYS2 CLSD
02S11(V) 0.060-0.805
O2S21(V) 0.030-0.930
STFTRM21(%) 3.9-4.7
02S22(V) .445-.455
OBD2STAT CA

Pocket

iTrader: (22)

Your front O2s are fine, no reading for the drivers rear. Under normal operation they switch constantly from about .01-.95v. A bad O2 will be stuck at one value or never go to a certain range

O2S11(V) : .xxx
O2 Sensor Bank 1 Sensor 1 (front) measured in voltage : value .xxx volts

Something is amiss though, the PCM is cutting 27-28% of fuel for your drivers bank

eroc022

iTrader: (7)

yeah I have checked everything I could, possibly bad pcm ? O2s are wired correctly, everything else is hooked up right, just cant figure it out......

Frans96SS

iTrader: (15)

If you have 02 extensions make sure that are wired correctly... I have ran into that a few times.

eroc022

iTrader: (7)

no extensions.... Fran when your tuner tuned it, would he have been able to say if the pcm was bad ?

oange ss

iTrader: (50)

fuel trims are fucked,timing at idle is junk.. have it checked and tuned somewhere else

00_Trans_Am

Try a friends MAF or a stock MAF... MAF is my guess.

Frans96SS

iTrader: (15)

hahah your so smart

eroc022

iTrader: (7)

this is the third one I have put on it......

eroc022

iTrader: (7)

it wasnt much of a tune, its a stock motor..... I just took it there to see if it was going to run right, and double check everything over..... I would go back in a heartbeat.... friendly great guys up there....