Rough idle Alloytec

[heyitsEnricoPallazzo]

Fella's.
Heard a rattling sound coming from the engine the other day. Popped the hood during idle and removed the left bank cover. The sound was coming from the Purge Control solenoid. My understanding was this is not supposed to work at idle? Can anybody shed some light on the conditions it is supposed to operate? Tested it last night and it seems to be working fine. Thinking it may have something to do with the rough idle I experience from time to time.
Your thoughts please.

[shanen]

I have the same problem but would discribe the noise a ticking.
If you hold it you can feel it chattering away.
Will post a vid tomorrow.

[imoore]

all it does is vents out the charcoal canister. if this was to operate at idle the engine would get extra fuel and air. this would quite possibly cause a rough idle. an idea when it does idle rough unplug it and see what happens if it smooths out or not. but keep in mind it will throw an engine light.

[heyitsEnricoPallazzo]

Would like to try and disconnect. But I've got to catch it first. Thats the problem.

Shanen. Have you made that videos yet?

[shanen]

Here is the link.

YouTube - Ticking noise from engine- vz alloytec commodore

[heyitsEnricoPallazzo]

Thanks for that. Exactly same as mine. Gave it a tap and it stopped. Could be getting jammed? May try a replacement.

Sent Holden Customer service an email about the problem last week. Got a voicemail from them yesterday wanting me to call them back. Great I thought. Might have some info on the problem. Rang them today quoting their reference number. Quoted number to the rep, put on hold.....finally replys later with, please consult your Holden Service Technical Advisor on your issue. What a waste of time! Would have been easy to say that on the voicemail.

[heyitsEnricoPallazzo]

Spoke to a Holden Technical Guru today. He says it is normal for the PCS to operate during idle.

[shanen]

Ok... Nothing to worry about then?

[heyitsEnricoPallazzo]

Looks that way. He also said rough idle on the Alloytec is normal. Bah.

[Little Red VZ Go-Kart]

Looks that way. He also said rough idle on the Alloytec is normal. Bah.

Bullshit. "Normal" when it is caused by something requires servicing/replacement.
The PCS is feeding miniscule amounts of vapour into the engine all the time and by this action it does not cause rough idle. For all that can be said, what about a dirty MAFS? Cold engine? Too many short trips? Spark plugs? Dirty injectors? Unserviceable fuel filter? A slight bump now and then does not qualified a "rough idle".

[grug07]

hey, just wondering if u worked out what the problem was my car makes the same noise

[kronich3244]

that same thing ticks in my car... but its not constant like that... say if i give it a little rev once my foot leaves the pedal and the revs start to drop it will click once... happens everytime i give it a little rev!

[heyitsEnricoPallazzo]

Solenoid pulsing at idle makes a fast ticking sound. Sounds like dodgy injectors.

I still maintain it should not operate at idle!