alboy91lx

im not to new new to th mustang thing... i have a 4 banger mustang 2... i just bought a 91 gt from a buddy... the car ran like ****! so i started taking the ar apart just o carb it so i wouldnt have anymore issues... as i plled the fuel rail off of it i noticed that 3 injectors were missing caps... so i figured that was it... so i went to summit and bought 24 injec and the granitelli mass air to match it... a pedelum spacer for the trick flow intake mainafold (which were on the car before) and the bbk cold air... so i get it all together and the car runs a hell of alot better... but it still seems to run like ****... i put new plugs in it... o2 sensors are brand new... i havve the fuel pressure reg all the way closed... if i open it the car runs even worst... any ideas? oh a and the car is an auto... and sorry i cant spell...

cody91mustanglx

sounds like to me , i would go with a new fuel pump and just start buyin brand new parts from there. but honestly i have no idea whats wrong wit ur car

ctgreddy

not sure if it affects it but 24lbs are wayyyyy overkill for your relatively stock motor.
that could be why you have to have the regulator basically closed.

Shelty

yeah, go back and get some 19lbs, and the correctly calibrated MAF also, check your sensors, the EGR (unless blocked off) the IAC, TPS, try seamfoaming the car, check for vaccumn leaks, etc some elbow greasewill get her good asnew.

also, try replacing the throttlebody gasket,could be leaking

alboy91lx

but... so 24's are too much for what i got? evern with the upper and lower intake a spacer and bbk shorty headers with no cats and h pipe? if thats it ill try some stock 19's... my buddy told me to try and instail the stock map? wouldnt it run worse?

notchbackmatt87

stock injectors will be good.