hi guys..

well i got stage 3 closed loop system, 4x4 tps, greens, t34.48, 3 bar sensor, and all the kit to run stage 3, i took it for a dyno today and ony punched out 310 bhp as the tester didnt want to run it further as the engine was getting dangeroulsy lean at around 4500rpm..before 4500rpm it was running a little rich but then had a massive lean curve..

does anybody know why this could be happaning and how to resolve it?

cheers aaron