Ok here is my issue car is a 91 ta 305 auto I've replaced all the sensors under the hood replaced ecm whole distributer plugs wires and fuel pump the correct way by dropping the tank car runs good for couple blocks then begins to over fuel and I'm having problems accelerating what could be my problem I'm at a loss and not sure what to do

 

check ur fuel filter mybe replace it also does it run good idling/sitting there? i would also get your injectors checked is it tbi? if so if it starts messing up while sitting there idling mybe keep an eye on ur tbi injectors mybe u can see something going on with the fuel spray going into the tbi

 

also check ur fuel regulator

 

It is a tune port changed fuel filter about 2 months ago I could try pressure regulator but it looks new

 

Ok I've changed pressure regulator and also got bbk adjustable set fuel pressure at 47 psi drove to work and back around 30 miles having same issues re checked fuel pressure it is back down around 36 at idle and when I open the throttle it drops to about 20. think my walbro 255 is bad?

 

Changed fuel filter ran great for about 20 miles then ran bad again I'm running out of ideas thinking of selling my tpi and going carbed