is it normal for the o2 readings to fluctate..at part throttle cruise from in the 300 right up to 750...changes all the time from high to low...at wot they steady out??
Sorta.Too much fuel can actually cause a poor combustion condition.
So can too little.
Ask anyone who's failed an E-test with the fuel pressure real low and had to turn it up to pass.
We did exactly what I suggested with Bill Savino's car at BG this year when he had the same problem as you and the car snapped back in line.
Those trends for O2's really only apply when you have all the air and fuel combusting properly.
Just keep an eye on the knock gauge.
What plugs are you running?
What gap?
Engine properly broken it yet?
One thing I didn't think to mention is that alchohol tends to be a "cooler" burning fuel and may alter O2 readings because of this.
You running Sunoco gas?
im running upi 94...before i replaced the engine it ran the same but the o2 were at 800...i replaced the engine and now im getting lower o2's...not any slower not any faster???
not sure..i'll try a different brand...i think im going to put my street 93 chip in it try and see how it works without the alcohol...too many "ifs"with the alcohol
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