my car for some reason everytime I go to the track runs lean, go back to the street and goes back to normal, I don't get it, the last tuned we did it like drag style (road tuned) the car was fine really happy with it, test drive the car before I hit the track everything normal I did first run air fuel on 1st 2nd is 11.7 3rd jump to 12.1 and 4 jump to 12.4, second run the same 12.4 this is spike 23.7-24 psi holding 21 any ideas why? thanks

 

Was it tuned on the "hot as hell" day as your sig suggests?

 

no, I just tuned again a few days ago temp was like 70, went to the track last nite temp was like 65, this only happens when I go to the track any other time the car run fine

 

When you run the car at the track are you running it low on fuel
It could also be weather condition cool weather and low humidity so the car is reading leaner because it making more power
Jester is a great tuner and would not put your car on the edge if you think something is wrong with the car you should give him a call

 

Maybe your fuel pump is going out ?

 

It ONLY does it at the track. It runs normal A/F on the street so i doubt the fp is going out

 

possibly running out of injector is what comes to my mind first, I noticed (from your sig) that you have not upgraded them. With enough timing and boost, many bolt ons, especially cams, can run the stock injectors past there limit.

 

Don't get me wrong i love the tuned from John, I never run my car low on fuel not a good idea, like the title only at the track I log my car before I went to the track AF was 11.7 then I run at the track jump to 12.4

 

I didn't think of that I guess that could be my next mod