99 vette ls6 cold start idle and tuning HELP

[Proven Power]

this vehicle has bbk 80mm intake and throttle body has anyone had problems with i have vacuum leak i think is plate at bottom of intake

[Russ K]

A vacuum leak is not causing the negative fuel trims. Your tune is way too rich.The even numbered rows of the sec VE table has to match the even numbered rows of the primary VE table. And your primary VE table is a real mess. You need a wideband to tune the VE table.

If I was tuning your car, I would enable the Maf & return the VE tables back to stock. A Maf table can be easily tuned using fuel trims to get the part throttle close until you get a wideband.

Russ Kemp

[Proven Power]

thanks russ how would i do the maf tune and i will put ve tables back to stock for now and get windband ordered