Any Idea what this is and do I need it ?

 

Isnt that the carbon canister?

I think it's something to do with the PRVR but I'm not 100%. I will do a quick search

it's used for the PRVR.

You don't need it, but disable the PRVR first...

If it's under the passenger side wing then it is a vaccum buffer tank that I believe is used by the system that raises the fuel pressure when the engine is cold (Can't remember what its called)

 

The vaccuum hose connections are week as crap as I found out when changing the vaccum hose

it's used for the PRVR.

You don't need it, but disable the PRVR first...

 

Thanks Eric, can I just connect the pipe from the FPR to the plenum and do away with the relay as well ?

 

Stu, this is totally unrelated but what strut brace is that? Where dya get them?

Stu,

yes, it's the surge tank for the PVPR system.

Connect the FPR straight to the manifold and you can remove the tank, the solenoid and the non-return valve.

Surely there must be some side effects if it is removed and the PRVR disabled

Surely there must be some side effects if it is removed and the PRVR disabled

 

i was thinking this too.

 

not sure quite about on a zed, but most modern cars include the purge valve in the closed loop system. i take it the cars not going to run weak without it??

 

also what do you do about tank venting?? just vent to atmosphere?? :confused:

 

are there actually any benefits of removing it then?

PVPR isn't fuel tank purge, do a search, (maybe PRVR!) I tried to explain it recently.

 

There it is:

 

PVPR is pressure regulator vacuum relief system.

It's designed to boost fuel pressure for starting or if fuel temp > a certain value.

It works by switching the FPR's vacuum signal between manifold and a surge tank that is held at max boost pressure.

Removing it saves some weight if you remove the solenoid and tank, and also simplifies the vacuum piping a bit. Also, it's less parts to go wrong / split on this crucial line.

Removing it has the possible downside that the car may be harder to start, and you loose the (very little) protection it gives for the very unlikely hot fuel condition.

I've had it off mine for ages and had no hassle what so ever starting it.

ok, looking at the pic it looks like a purge tank :)