Injection pump help

[Black dawg]

Yes Oldbull8, my engine ran fine before i replaced injectors.
I replaced all 8. Don't know if i mentioned that before.

I think that I would be testing those injectors.

and for what its worth Ive had equally bad luck with all letter code injectors.

 

[e30bradley]

My friend has 480xxx on his truck.. He bought it from the second owner a few months ago and swears the IP and injectors are original. It runs alright but it has a bad 'flat spot'.. He recently got 21.5mpg on a trip which he traveled 45-55 mph the whole way. Its an 86 f250 4x4 3.55 4spd regular cab with no tailgate and lots of rust.