Vx V6 commodore intermittent miss in engine

[jenks]

hi all just after a bit of help my 01 vx has developed a intermittent miss, on startup coughs and splutters for 15 seconds then clears up but when put under load will also hesitate and miss then you hear a loud cracking sound, then it clears itself up and runs fine with the occasional miss and till you stop the engine for a while and start again.

i have so far replaced leads, plugs, fuel filter which was chockers full of crap blew the fuel lines out, cleand maf,idle,and tps, rechecked plug gap, ran injector cleaner through it but my senses are still saying injectors any ideas?

[Cashman_309]

Might want to get a fuel pressure test but yes this is pointing to injectors.

[jenks]

cheers ill give it a shot whats a healthy fuel pressure range?

[Cashman_309]

First result on search for "ecotec fuel pressure" says
V6 ecotec (VS) 3 bar (43.5 psi)
V6 ecotec (VT-VY) 3.5 bar (50 psi)

If its within a few psi of that then its not your pump or regulator

[jenks]

thanks ill give it a shot