94-95 uses a lower flow rate injector @ a higher pressure . Spec for the 94-95 GM 454 TBI system was 28-32 psi . The fuel pump was different as well as the spring in the factory regulator to produce...

You don't know what injectors you have unless they have been flow tested @ a specific PSI , I have asked multiple times for you to provide where these new injectors came from but never received an...

Put a scan tool on it and watch the O2 readings , I believe I mentioned doing this in an earlier post .

I also questioned the validity of the "90 #/hr" injectors you installed , were these from a...

Where did the injectors come form ? Were they flow tested ? There were no 90#/hr injectors offered by GM so I would assume these were aftermarket? Do you have a spec sheet from them ?

10.5 PSI...

If the flow test was done @ 13 psi that means your injectors now flow 48.6 Lb/hr @ 13 psi , they are really flowing around 42.6 lb/hr @ the 10 psi you say you have ,not nearly enough to fuel your...

And to expand on what I said earlier , when your injectors were flowed , there had to be a pressure they were flow tested at .

We can assume the 510cc was flowed @ 10.5 psi (which is what GM...

If (and its a big "if") the injectors you have are only flowing 510 cc (48.6 lb/hr) you have found your problem.

Possibly the flow is enough at idle and part throttle that it runs good , but when...