454 tbi i need help

[DragginMY88]

I have a 88 Chevy dually with the 454 with TBI it starts up and idles fine but when I push down on the gas it hesitates iv replaced the injectors and fuel pressure regulater now heres the thing my truck is bagged and body dropped it didnt start having this problem till the body drop was done and now that I replaced the injectors and regulater it runs worse!! Does anyone have any ideas to throw at me

 

[Bill USN-1]

Sure but first, how did you get here?
You have a bagged 454 Chevy truck and your asking about efi on an IH site.
Seems a little wierd.

But to start with you need to run a fuel pressure check on the inlet side at idle and at wide open throttle.

It sounds like you have restricted fuel flow.
Could be a pinched hose when it was lowered.