What's this vac line for ?

[StavTB48]

Hi all,

Could someone please tell me what this vac line is supposed to be plugged into? Obviously not the screw that's in the end also sorry for the bad photo... I decided to drive over my phone in the patrol ... camera didn't like it but the screen survived...

03 TB48 GU LPG/PET

It was tucked in hidden behind everything running along the firewall.

[BigRAWesty]

Can you chase to the other end?

[Avo]

time to go to a caryard and pop the bonnet mate..lol

[StavTB48]

Hi bigqwesty yep the second pic shows the solenoid that the line is coming from.. Didn't realise it was that bad and looking at it now I don't know why i would have thought anyone could have in the first place. Maybe this one might help.

wa 489 good idea i never thought of that then again i would still have no idea what its for or if its needed. Lol

[BigRAWesty]

Much easier to see lol.
Hopefully one of the 4.8 boys will chime in soon..
There's no issues atm with the car? Little things like excessive fuel usage? Or maybe a little under powered?
Or does the engine rpm increase a little at idle when the ac is turned on??

[StavTB48]

Thanks for the reply Kallen, only issue with the car at the moment is the throttle body error and tripping into limp mode... I picked up a new TB yesterday as i have now had two shops tell me it needs to be replaced and its yet to be fitted possibly next week. I'm resetting the fault codes every time it comes up.

Yes I am lacking some power however its not a huge amount but could be the result of me disconnecting the battery for a while whilst attemping to get out of limp mode before I got my hands onto a odb connector... I'm guessing this is unrelated as i might have lost my tune for running on the LPG. Its always run like a pig on Petrol since I have had it with what I would describe as like "turbo lag" on acceleration and is rough/chuggy on idle so not really drove it much on the petrol especially since i fitted a Flash lube system. Its still getting up and going but just a little more pedal is needed on the lpg than before.

Not sure on the fuel usage as not really made a good effort to keep track, I am getting roughly 280/300 K's as a guess to a tank of LPG I think its a 95L tank this is around the metro area varing from 50/70/100k's and traffic lights but not yet had a full run from full to empty on the LPG tank as of yet, no big tyres only 2 bars on the roof and a Steel oppisite lock bullbar. I was hoping to sort the throttle body issue out first and then find a good shop qualified for LPG to give the system looked over and tuned it is the older vapour type.

First Patrol and first time running on LPG so Ive dived into the deep end with this buy

[threedogs]

On another thread there was a reference to a perforated sheet behind
the maf sensor fitting , apparently if this gets holes it it things can get sluggish.
Might be worth a look
Pull that vacuum hose tight and move it around to see if any spare points it will
fit or another pipe blocked with a small piece of hose and a screw

[StavTB48]

Hi threedogs I do recall flicking past this post you mention a while back and mine has been removed as the gas converter is plonked in that corner of the engine bay, didnt think anything of it at the time but now you mention it i guess it could be linked to this, I will have a look and see if it mentions blocking a vac line.

[Fozzee63]

I recon it might be for the aircon Idle up vacuum sounds like the same position as mine on the drivers side firewall I had mine connected and disconnected it made very minute difference to idle rpm's, was reving up a bit to much for my likings

[BigRAWesty]

I recon it might be for the aircon Idle up vacuum sounds like the same position as mine on the drivers side firewall I had mine connected and disconnected it made very minute difference to idle rpm's, was reving up a bit to much for my likings

This was also my thinking but not sure how the newer tps setups worked in regards to the alight throttle increase.