after installing the mach 4's i have a missfire at high rpms. it seems to do it somewhere between 2500-3300 rpms. any ideas, not enough fuel, stock lift pump not supplying enough. it never did this with the jammer 4's. this is with the comp on i havent tryed it with it off yet.

 

anybody have an idea?

 

Do you have fuel pressure gauge? What kind of psi are you maintaining. Sometimes the wastegate will blow open and flutter a bit causing the feeling of a miss. Try a pair of vice grips on the boost line and see if it still does it.

 

im also only making 35psi of boost i was making 38-40 psi with the jammer 4's. no fuel pressure gauge

 

Did you check all of the injector line connections at the cross over tubes in the head, if you see fuel, you've got problems right there.

 

no fuel leaks everything there is good. after work tommrow im going to try and eliminat some possiblities. i also did intercooler boots at the same time as the injector change

 

any other ideas

 

I'll bet money you didnt get eaither an injector seated well or you have a leaking connector tube! You might slap some new o-rings on the Connector tubes ...
( For dis-belivers, Yes o-rings on the tubes if bad or missing will cause hard starts and fuel leaks, It lets the connector tube move causing a bad seal)

Its not somthing someone will be able to diagnose easily online!
im 99% Positive you have ,
1 A Loose fitting or fuel leak
2 Air in a line, (low possibility if ran for any period of time)