Fast.Type-S

Yes, it's tuned to produce 600hp tongue.gif smarty guy tongue.gif

BV1

So your running lean at WOT on a stock ECU?
-Steve

Canadian Prairie Shark

As Random said, the guage cannot keep up to the O2 sensors output.

Fast.Type-S

During say highway driving with A/C on (A/C seems to matter..make run leaner) im about 2 to sometimes 1 click away from being in the lean area on my Phantom A/F. I'll be do my S-AFC instll Friday...so we'll see....

Mach 5

Sounds more like the wrong O2 wire has been tapped, our cars tend to be pretty rich, on idle, my Phantom spans from stoich to rich (2/3 of total guage), when I floor it, it allways runs a few bars into the rich side. But again, this is my car and you could very well be wired correctly and running very lean.

Shark Racer

I get error codes from my computer telling me my Tib is running Lean, so I think what the question is "How do you get these 2.0L engines to stop running lean?" Any ideas???