i have a 92 camaro rs with 305 need some help wheen driving at stedy speed car fills like its going to bog out when in park an at 1300 rpm's it dose the same thing now i have put a new fule pump,filter,02 sensor,inje,timing was done plugs,wire,intake,exhaust, dont no what it can be can some one help

 

ses lights? have u had it scanned for trouble codes? is it tbi or tpi?

 

no codes an its tbi

 

He has TBI unit. At this point rebuilding it might not hurt, it's easier to work on than a carb.
On your fix list, what do you mean by "inje"?

 

did u check to see if the spark advance is working when u had the light on it? was the timing jumping around or steady when rpms were steady? did u say u replaced the injectors in the tb?