vt commodore

[mickeyc]

hi , my vt (v6) is running rough when accelerating .ive replaced plugs,leads,coilpaks, dfi unit and had injectors sonic cleaned and still no joy.could it be the crank angle sensor? or am i missing something. can anybody help

[vt s]

only under acceleration right? has someone with same sounding prblem and turned out to be a magnet on the cam sensor..

[mickeyc]

cheers for info on cam sensor, i will look into that.

[Scottie666]

i'm having the same problem, when i accelerate hard it kinda chuggs.on the highway in white d i put my foot down and it splutters until a certain rev range then is fine. only happens at low revs. could it be shit fuel. any suggestions would be great

[Static89]

fuel filter?

[Scottie666]

didn't think of that cheers dude, any other suggestions.

[Scottie666]

how hard is it to change the fuel filter, not used to injected cars. and with the diagnostics which is the 6 plug and which is the five

[accentstencil]

didn't think of that cheers dude, any other suggestions.

Leads or spark plugs. My money is on a faulty lead.

[Scottie666]

Thanks mate, i have replaced the plugs with bosch super plus, was thinking on doing the leads but wasn't sure. i took it for a strap before after changing the plugs and it did it once and then hasn't done it since. the leads look like originals so probably should replace them. thanks

[Scottie666]

hey guy's well i replaced the plugs as i said and i have put new ignition leads on and it is running like a shitter, only under load. once it starts to pick up it runs perfect but then once i flatten it it splutters and then stops doing it, any other suggestions. there is no water in the oil or vice verser si it can't be getting into the plugs to do this. i'm stumped

[Scottie666]

hey guys i have posted messages with so far no luck on answer and was wondering if anyone had any clue as to what is wrong with my car? here is some clues to help with:

hey guy's well i replaced the plugs as i said and i have put new ignition leads on and it is running like a shitter, only under load. once it starts to pick up it runs perfect but then once i flatten it it splutters and then stops doing it, any other suggestions. there is no water in the oil or vice verser so it can't be getting into the plugs to do this. i'm stumped

:

[accentstencil]

Did the problem start before or after you changed the plugs? Usually when a miss occurs under load it is something electrical, plugs. leads, coil etc.

[Scottie666]

hey man, it was doing it before i did the plugs and leads but it has gotten worse, i have checked it for spark and there is plenty there. what do you think?

[accentstencil]

I would be looking at the coil packs next but it gets a bit expensive just replacing things in the hope that it fixes the problem. Do you know anyone with the same car you could swap coil packs with to see how it goes?

[Scottie666]

what do you think about the internal noise? my mrs' uncle has one but he is on the other side of town

[Scottie666]

RE: accentstencil,

we know someone with a vp holden will that work?

[Scottie666]

do you know how to tell which coil pack is stuffed

[Scottie666]

i got a price on them, $48 to $60 each pack. sounds reasonable doesn't it

[accentstencil]

do you know how to tell which coil pack is stuffed

Get a multimeter and check the primary and secondary resistance.
Primary resistance: 0.3 -1.5 ohms.
Secondary resistance: 5-7 k/ohms

[accentstencil]

i got a price on them, $48 to $60 each pack. sounds reasonable doesn't it

Yes it does, but test the old ones first. You don't want to waste any more money, although new plugs and leads is not really a waste if they haven't been replaced in a while.

[Scottie666]

thanks mate, good thing my good old dad bought me a multimeter. i'll let you know thew verdict maybe if you think of anything else you could get back to me.

[Scottie666]

number 3 and 6 (1st coil pack) is reading 6.4, number 1 and 4 is reading 6.4, number 2 and 5 isnt reading anything

[accentstencil]

number 3 and 6 (1st coil pack) is reading 6.4, number 1 and 4 is reading 6.4, number 2 and 5 isnt reading anything

Sounds like 2&5 is the problem. Did you double check it?

[Scottie666]

yeah i have checked it numerouse times, but it is running ok, but then i just checked it and it is reading nothing still. took it for a run flattenened it and it started spitting, then i turned aroud and went back and it didn't spit. so i'm guessing it is the coil pack 2&5

[Scottie666]

just let it run for 5 and then turned it off and checked them and 5&2 is reading now 6.5ohm
it looks like this could be a problem than need to be fixed