Idle problem

[LYRIC]

Hi i am new to this site looking for some advise.
im driving a VT s pak S/C V6 it runs really well considering i have no mods other than a high flow cat & a K&N pod, however my problem is
when i take my foot off the gas between 70km - 100km the revs
seem to fluctuate ( hovering ) between 1000rpm's & 1700rpm's.
i have changed both idle & air flow sensors as well as the IAC valve.
and the boy @ holden dealership are puzzled.
can anyone help it would be appreciated.

Thanx
Lyric

[patrick]

I had a similar problem with my previous car a VS. One of my mates suggested cleaning out the throttle body and it seemed to fix the problem.

[LYRIC]

Cheers mate i 'll give it a go hopefully it solves the mystery

[VT-565]

could it be a problem with the supercharger bypass? just having a stab, but that is another thing i guess that could cause that problem....

[speters]

i was just wondering if u knew where i could find a cold air intake system for a 3.8l v6 vt executive commodore?

[LYRIC]

You could be right if the bypass has a slight leak it could couse a vac
witch than could couse the problem.

[LYRIC]

Speters

Cheak out Forced Induction Technologies Ph: Tony on 0413 900 900

Lyric.

[speters]

Cheers, I Check that out

[VT-565]

You could be right if the bypass has a slight leak it could couse a vac
witch than could couse the problem.

or maybe in reverse effect, there could be little boost spikes causing the revs to fluctuate....

[LYRIC]

But wouldn't that couse it to fluctuacte through the whole drive couse only
does it between 70 & 100kmph ???

[VT-565]

not necessarily...i believe it is electrically controlled so it could be a problem there.....

[LYRIC]

Ok i'll try every thing you guys have mentioned and let you all know of the outcome.

Appreciate the info i'll keep in touch i may be able to help yourselfs
out sometime

Lyric

[VT-565]

yeah, cool...."wisdom is admitting you have none"......

[LYRIC]

Ok guys i removed the throttle body and the IAC valve gave it a good clean with some carby & injecter cleaner, ( these things do get dirty )
it has helped allot but still doing it a little bit but you can't notice it that much so i guess we are on the right track.

Also FYI i got a spare key cut from MR.Mint cost was $150.00 for 2
and they both work just fine, apposed to Holden charging $240.00 for 1