ok i have a 94 formula and i have a lean miss from off idle to around 2000 rpms. i have tuner cats but i dont know where to start. Here is a list of my mods lt4 heads, lt4 manifold, hot cam, 1.6 roller rockers, 52mm throttle body, bbk headers, t/b bypass, cai, underdrive crank pulley, maf porting, adj fuel reg, 3.73 gears, borla exhaust with 3" y pipe, no cat, vortech intake elbow, and tr6 plugs. i can send my tune file if you would like just let me know if there is anyone who can help me. i have tryed pcm4less with no luck at all and he wouldnt email me back. so just let me know guys. thanks Josh

 

do you have a datalogging program? that would be more beneficial I think