Hi guys,


I have 2wd sapphire that is cutting out when i floor the throttle.It runs perfectly at idle or even below 17 psi. If I accelerate "gently" it will go right up the rev range but when I floor it the engine just cuts out as if I have turned off ignition. After i release the throttle it goes again .If I continue holding down the throttle the boost goes down to 0 and just keeps running with no power and i cannot hear any misfires even just holds back
I went through the following items and still no joy
tried 2 ecu's and chips
co ok
all sensors are new
plug gaps all the way from .65 to mean .30
checked all harness
fuel pump wiring new
earthed ignition
phase set 45 deg atdc with protractor
ik 37 plugs
new leads
fuel pressure checked and rising acc to boost
afr ok
fuel lines checked
new 044 pump and new filter

Most things are checked and new but the fault is not found yet
(spec 7.2 comp ,t34 .63, greys ported 27mm inlets and 25mm exhausts,bd14 inlet cam)
Any help will be most greatly appreciated as i am stuck now with what i am going to check next .