Originally posted by TyphoonZR
That's what I thought too after I had removed it and found this out while I was in the store. I wish I could have tested the pump while I had it.

Be that as it may, even if we were both mistaken, the store clerk and myself, if it was the 8 psi model, even that, according to the first post on this thread, it could still be my culbrit. I guess that is really what I was trying to say.

But I thought that a holley carb could handle 8 psi. I wonder if my high flowing needle and seat could have added to the problem as well?
I have run as high as 8psi. but when I tried 9- to 10 it would push it past the needle and seat assembly which woul cause a my idle to go up and down.