I have been reading some threads about similar problems but i just needed a more direct approach. i recently completed a swap in a 1991 honda civic si.
specs
-obd1 b16a stock
-itr style 4 to 1 header
-chipped p28 ecu with many sensor deletes ( more info on this later as i am not at my parents house where i have the spec sheet)
-excedy stage 2 clutch with a lightweight flywheel ( 6 puck)
-jumper harness
-obd1 injectors
and the rest is stock so there is not much to be said . but the issue is the car has no power i cant get it to engadge in 1st. i can buck the clutch until i get some speed and then i can engadge the clutch and when i floor it it goes nowhere its almost like a tractor. it starts first crank and sort of idles like a subby. but i dont know if thats because of the 4 to 1 (open header atm). i read the plugs and its running rich as hell almost smells like a 2 stroke go kart. i know it dosnt burn oil because i dont get any smoke or smells. there is also only one code for the iat which shouldnt cause this issue?on a side note when the car is not under any load it revs freely. another issue as i dont feel its related (but could be ) is when i shut the car off there is a massive vacuum leak , a woosh type sound coming out of the booster. i bleed the brakes and they feel great when the car is of but when its on the pedal goes way to far to the floor and i can fluctuate the idle greatly but pumping the pedal(more than normal).
thanks i just need some direction because what im thinking is way to broad and i dont want to play a game of pray and replace.

 

Starting Problems

 

Have you checked fuel pressure? 94