Daemon4x4 - 4x4 & Off Road Technical Board

Should save me losing 4WD again, just as I need it.

pic of engine bay too if you could so i can see whats where
ta

The bog standard bits:




The rerouted hoses to maintain smooth engine shutdown now that the EGR VSV's are gone:



The VSV which controls whether the boost sensor receives any vacuum/pressure:



The inline suppressor to prevent any sudden pressure hitting the sensor when the VSV is switched:

you seem to have more bits on yours, have you modified things? where your boost pressure sensor is, what is that think infront of it where more pipes go to, also the pipes that go into the drivers wing, where do they go? im really thinking of this now as im loosing boost pressure and have cracks in pipes going everywhere.

muddle wrote:

do you have extra one way valves in place too?

That one between the boost sensor and the copper/brass suppressor? Quite probably added that one as an extra precaution.

muddle wrote:

you seem to have more bits on yours, have you modified things?

Somewhat. Those relays you can see control the rad fan, (ditched the viscous fan). That copper/brass jobbie is the suppressor for the sensor.

where your boost pressure sensor is, what is that think infront of it where more pipes go to

The thing bolted to the side of the air box? That's the VSV, (from an Isuzu), which controls whether the boost pressure sensor is in circuit or not. It effectively enables/disables turbo mode. VSV off, no pressure ever reaches the sensor, so the engine works more akin to a NA engine, (exempting the fact that the turbo is still physically dragging air through the sysytem, but there's no extra fuelling applied for it).

also the pipes that go into the drivers wing, where do they go? im really thinking of this now as im loosing boost pressure and have cracks in pipes going everywhere.

Those two hoses going through the inner wing go to the vacuum resorvoir. It's mounted in the offside wheel arch. You'll see a canister about 6" in diameter if you look in your wheel arch. That's the reservoir.

Not isolate as such. It just prevents more fuel being chucked out once you get to 2500+ RPM, when the turbo usually kicks in. The turbo would be less stressed if you had a knacked impeller or the like, but it would still sound like a bag of nails, I'd guess.

Matt wrote:

Not isolate as such. It just prevents more fuel being chucked out once you get to 2500+ RPM, when the turbo usually kicks in. The turbo would be less stressed if you had a knacked impeller or the like, but it would still sound like a bag of nails, I'd guess.

Thanks...that makes sense. I get it now. Will get some hose from ebay.

ok cool, im trying to think of/do mods that are beneficial towards the running of the vehicle. i hear a lot that people adjust the fuel pump on their surfs too, is this true or rollocks?

muddle wrote:

ok cool, im trying to think of/do mods that are beneficial towards the running of the vehicle. i hear a lot that people adjust the fuel pump on their surfs too, is this true or rollocks?

I would be wise to sort out the blue smoke problem before adjusting, modifiying or tweaking anything else.
Blue smoke that you're concerned about in your other thread means the engine is burning oil, which usually means worn valve guide seals and/or turbo seals.