FCar2000TA

iTrader: (7)

I replaced a Nick Williams 102mm throttle body with a Mamo ported Nick Williams 102mm throttle body. I adjusted the set screw until the TPS voltage was bouncing between .63 and .65. Before the swap, the AFR on startup was 12ish, then it would settle at 14-15 after a minute or so. Now, the AFR on startup is 19ish, then settles at 14-15 after a minute or so. I have not been driving until the AFR settles to 14-15.

I assume I just need to adjust the set screw to close the throttle blade a little to bring the startup AFR down?

I am getting a new dyno tune in the near future, so I am not even sure if this is anything to worry about.

G Atsma

Have you discussed this with Tony? That would have been my first call....

FCar2000TA

iTrader: (7)

I thought I should research a bit before bothering Tony.

FCar2000TA

iTrader: (7)

So, I did some adjust/document/TPS reset changes back and forth quite a bit, and there really was not much change. Went back to where it started, and I'll just continue to let the car idle until 14-15 AFR before driving.

RedXray

Have you tried adjusting the open loop EQ ratio (fuel > open loop > base EQ).
You can add more (or less) fuel while while in open loop by adjusting this table and won't effect fueling once you're in closed loop.

FCar2000TA

iTrader: (7)

I will take a look at that, thanks.