i jus recently installed a comp 510 540 lift cam, lt4 intake, trickflow heads cnd 36lb injectors.. i also had ion at madz28.com custom program a chip to the cam and injectors well with it all in and i started it up it didnt run well at all it skiped really bad and would hardly idle and it reved really slow. so i put the stock injectors and chip back in to see if the new chip might be the problem and it still ran really bad.. i know that it is not gonna run good with the stock chip and the big cam but i dont think it should be as bad as it is so i was thinking that it might be something that i did when i installed the cam and heads.. if any one has any ideas or sugestions let me know.. maby it is a sensor or something or the opti i think the opti will only go on one way with the gear that drives it lined up but im not really sure its the first lt1 i have ever worked on..