TT Stumble/Hesitation Conzult Video

[WhiTTe Z]

NEED HELP


Does anything here look off??


This was recorded from free version of Conzult and Blazt cable
Did 4 street pulls
Clearly the Speedo is not correct on the conzult

[youtube]http://www.youtube.com/watch?v=HCSLYan3 ... AAAAAAAAAA[/youtube]

Idles and drives fine until 3700-4000 RPMS when under load

All ready:
New Injectors and seals (Nismo 740's bought from you guys)
New fuel filter
Changed Spark Plugs
Changed MAF
Got rid of "spaghetti wires" on PTU
EPROM from Specialty Z
Replaced Coolant temp sensor
New PCV valves and hoses
Timing Belt Replaced

Again, Idles and drives fine until 3700-4000 RPMS when under load. Gets better as the car gets hotter.
Code 55: No codes

[nissanfreak12]

Is the ECU tuned for 740's?

[WhiTTe Z]

yes, SpecialtyZ EPROM