99_Z_155

iTrader: (7)

Allright, heres what happened. i just got nitrous for my car a while back. I just went to the dyno to see what the car would do. I mainly wanted to get a feel for the AFR because i dont have a guage right now. Long story short, we strapped it down, and ran a baseline NA, and the car was at 18:1 the WHOLE RPM band. we thought it was his sensors, so he put on some new ones, and it was the same thing. tried them out on a pickup, and they read fine. so my car is definitely reading that lean, and i dont know why. i have TSP's 233/239 cam, headers, ORY. I also have a mail order tune from them. The last time i dynoed my car it ran around 370hp without a dyno tune, which wasnt that bad. but now im running lean and cranking out a whopping 277hp. What could be the problem here? we checked the fuel pressure and it was around 58-62 psi. but the car is still extremely lean. any suggestions? has this happened to anyone else?