Rb25Det Fuel Cut Issues

[ali RB]

hi guys i recently bought two r33 gtst's and one was a automatic and the other was just a rolling shell i transfered all the running gear into the straite shell and also changed the gear box to manual i put a cat bak exhaust on it and a front mount intercooler i left the standard computer in it from the automatic one my electrician telling me ittl be fine and heel just bridge the inhibitor switch wires and run new wires for reverse lights and so on now its on the road and when under full acceleration and high revs it back fires through the exhaust so far ive changed the o2 sensor the coolant temp sensor the spark plugs and the fuel pump using the original one from the doner vehicle its really doing my head in i dont know what else it could be if anyone could help me thatd be reelly sweet thankssss

[luvpsi]

Coil packs are common however how much boost you running could be r&r or could be the ecu try a manual ecu

[ali RB]

the boost is stock there isnt any aftermarket boost controller on there the funny thing is that when u accelerate gently and u dont just slam the accelorater it duznt do it if u slowly push on the accelorater thnanks for ur reply man

[DVS JEZ]

Pull the spark plugs back out and gap them to .8mm and retest.

Did u change the fuel pump?

[ali RB]

thanks for ur reply man appreciate it today i put my scanner on the car and i got a dtc that sed

21 ignition signal problem

i think it might be the coil packs but am not to sure because only does it when u boost and under load so iduno man if u guys can help it would b good man

[DVS JEZ]

Try gapping the plugs down to .8mm and retest. If that doesnt fix it chances are u need new coilpacks.