Right not a nova but mk2 Astra gte 16v with c20let just fitted
engine was fully rebuilt and runs spot on when driving steady if I slam the pedal down it will pop and bang at any rpm only when hard throttle is applied sometimes I can nurse the pedal and get rpm up to about 4K before it starts it like your turning ignition on and of and others it just pops misfires boost when it does to around 9 10 psi Amal valve is fitted etc
spec is completely standard engine
Standard ecu
massive front mount and 2.25 pipe work
volvo t3 actuator fitted
everything else is standard
NOW IF I UNPLUG AFM CAR TICKS OF HIGH AND LUMPY BUT BOOST RUNS FINE UNDER FULL THROTTLE ???
i have changed
new fm coolant temp sensor
new cap new rotar
new leads
new bkR7eix plugs tryed 2 sets at 40 quid a go !
new fuel pump relay
new cool and amp
new afm
all parts fitted were brand new not second hand losing faith in this now I've spent so much
eml is wired up and flashes no codes ???
Odd how it boost fine with afm unplugged
any ideas ? I will pay for the right person to sort it
cheers in advance