missfire

[andy_man343]

Gday i have a vu v6 manual and i have a missfire not under load. If i just touch the throttle it missfires and when i give it a bootfull its fine. Iv read post on missfire undr load but mine is different. If i start it on a cold morning and just gentally ease the throttle it just coughs for a bit then picks up. I just dont want to go spending hundreds on replacing everything when it could be simple. iv replaced plugs. Another thing is i now run it on bp ultimate and it seems to be a lil better but its still there any help is much appreciated thanks

[motox75]

sound like a coilpack failing

[sradman]

I have similar issues, but have a few mods to contend with such as after marker supercharger roller rockers, injectors etc - miss-fire under load / heavy acceleration, like the timing is slightly out,also at high revs around 5000 rpm "holding back". At times backfire through inlet manifold when you "floor it" - ? coil pack, ? fuel filter, ? leads / spark plugs and ? chip issues.
under normal driving its relatively O.K any ideas much help before I spend $600+ $

[Tree cutter]

I have similar issues, but have a few mods to contend with such as after marker supercharger roller rockers, injectors etc - miss-fire under load / heavy acceleration, like the timing is slightly out,also at high revs around 5000 rpm "holding back". At times backfire through inlet manifold when you "floor it" - ? coil pack, ? fuel filter, ? leads / spark plugs and ? chip issues.
under normal driving its relatively O.K any ideas much help before I spend $600+ $

Sounds like your engine is running too lean