I wanted to ask some fuel/ fuel trim questions, but it could be completly a toss up.

After this couple weeks of owning I see my air/fuel on WOT is standing on 19.5-19.9

The dealer didnt completely know what he had with this car so, but I think it may be tuned with either a mix, or runs on e85.

Then again, since its running that high, it may not have been tuned! But i think thats unlikley with this build.

The symptom I feel on low boost on cold start and sometimes while warm is a slight stutter in performance when barely on the pedal. Shows me I'm leaning out some!

Build *Whipple 2.9, L99 powerplant*

 

i just tuned a whippled l99, go ahead and put your tune file and i can help you out.

 

Mine was leaning out @WOT it ended up wide band was junk. You could try changing the sensor?