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R34 Gt-T Vacuum Lines

owen1r

By owen1r,
in General Maintenance

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owen1r Collaborator

owen1r

Posted
Posted (edited)

Hi guys,

When I bought my R34 all the vac hoses were muddled and I'm in need of some help as I cannot find the information anywhere else.

Firstly, is it completely ok for the charcoal cannister to be removed from a r34? As it has the Solenoid Valve which controls the purge. Do I just block everything off except for the fuel tank breather?

I am currently using a manual boost controller and the OEM solenoid is disconnected. Is it perfectly ok to connect it to this nipple on the hot side of the intercooler piping straight to the wastegate actuator?

20131229_220613_zps7db3afb3.jpg

Where does the nipple on the BOV recirculation pipe need to be connected to? This is the nipple just before the BOV line goes back into the intake.

20131229_220646_zpsf1ed9265.jpg

It can just be seen here where the vac line connects (on the left)

Cheers

Edited by owen1r
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89CAL Grand Master

89CAL

Posted
Posted

Wastegate line should be fed from as close to the turbo outlet as possible to the actuator. I think the vac line you have pictured (coming from the intake tube to the turbo) is for the stock boost solenoid and was blocked off on mine

The BOV needs a feed from the intake manifold because you need the vacumm under closed throttle to help lift the BOV off its seat

owen1r Collaborator

owen1r

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Posted

Thanks, I've now blocked off the recirc pipe and the pipe going to the canister control solenoid.

Only confused about the lines running out of the canister, there are two and both go to hard lines. They then split and run down each side of the vehicle, i've traced the passenger side one back to the fuel tank but I can't find where the one of the drivers side goes.

StevenCJR31 Veteran

StevenCJR31

Posted
Posted

Why not leave the hoses/charcoal cannister connected? There is no power gain to be had by removing them and if the car is registeted for the road the cops can give you a defect notice

89CAL Grand Master

89CAL

Posted
Posted

Yeah as above.

Just trying to remember what lines go were. I had mine hooked up wrong for ages and it wasnt letting the fuel tank breathe real well.

I think one line goes to the tank (sounds like that one is connected), 1 goes to the throttle body vac port (cooler side of TB), one goes to the intake manifold, and I think one is just a vent near the wheel arch? Not sure about the 4th line

owen1r Collaborator

owen1r

Posted
  • Author
Posted

I might order some hoses to replace the split ones but for now wanted to eliminate that as a possible cause for a missfire issue I have.

I've tried -

Spark plugs .8mm

Fuel filter

Boost leaks

Reverted boost back to stock.

O2 sensor

Ordered split fires, any other ideas? Missfire is mostly below 4k rpm.

Cheers

Missfire can mostly be noticed below 4k rpm.

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