[crazypete]

I'm starting to storngly suspect that the o2 sensors are toast. These are fairly new, bosch units that I got in april. When I did my carb conversion, I just ran some power wires down to them and took the signal wire up to a pair of mixture guages.

At idle, they're up in the "orange zone", but the pass side one is always 2 "bars" lower no matter what. After ...oh....5-7 minutes, the guages suddenly bottom out, them bounce back, then bottom out. Almost like theyre fluctuating. Idle continues without problem and the vacuum reads an unsteady 16 hg's, goes up to a solid 20-22 at fast idle (1200).

Now when I accelerate, no problem, tons of power, decel, no problem, no backfire. The guages ride in the orange zone during accel, but when I start cruising, they bottom out to zero consistently. They come back to normal when I put in the clutch. The car does seem to...well....cruise a bit choppy, but just a bit.

I'm not running egr and it seems as if the crossover in the exhaust came loose again, I'm welding it tonight. I'm running 70/72 jets and 6.5 powervalve, floats dead on and a mechanical fp.

An ideas on why this leans out at cruise? Those jets should be plenty enough.

Thanks for any carb advice, you crazy racers!