Hondata

Incedentally, the CEL is on all the time with no code. I was thinking maybe the ECU itself was bad! If the ECU was bad I would have had that CEL right away correct? I wouldnt have been able to drive for a full hour with no CEL at all I wouldnt think.

Maybe this is my problem. I drove my car around for a full hour without a CEL whan I first installed the S200...and the CEL came on during dyno tuning, maybe Tempest installed a P72 ROM or a P72 program on by mistake. Would this also explain my VTEC fueling problems (going extremely lean @ VTEC ...

When tuning cars with Hondata, adjusting the A/F at the VTEC point will not affect the idling. ( ADDENDUM: with the FMU, it would be hard to tune the maps. It will result in a very ugly curve.)

Did you ask the guys why it was like that?

Maybe its your FMU. With Hondata get a bigger injector so ...

I installed my s200/b on the 28th, took my car to the dyno on the 1rst. While on the dyno the CEL came on, but would not flash a code. Is this a major problem? Has anyone had this?

Also right at the VTEC crossover the car drops dangerously lean, my tuner (Jason @ Tempest Racing) had to adjust the A ...