Today's report....

Originally posted by BIG VAM:
Hey Dan - I seem to remember an SVO article that showed the stoichometric fuel/air ratio of a 2.3T motor runs at 14:1 (ideal) under most circumstances, but when the turbo boost kicked in, the EEC-IV dumped fuel in based on the boost (just below 3000 RPM) which resulted in a 10:1 ratio and an ultra-rich condition, which the engine used up by 4000 RPM. Is it possible that you have too much fuel at this part of your powerband, and that is why the ignition made an improvement?

Just curious, because I am facing the same problem above 15 lbs on my car. I don't think that it is fuel, because I don't starve from 4000 to redline, so I am guessing that the situation might be outside the fuel maps of the EEC-IV, or that I may have a pressure reversion inside the intake tract (bone stock) - but what the hell do I know?!? [Image: smile.gif]

Anything's possible...including too rich. Until I get a A/F gauge (I know they're not exact) I won't have a clue. It's also possible that having to boost that high just compounded the problem.

At least with an Adj FPR, you can adjust it either way... [Image: smile.gif]