Quote Originally Posted by threedogs View Post
The vacuum lines are all the small rubber hoses going to turbo actuator and vacuum solenoid just left of air filter box.
should be 3 outlets from memory.
As Yendor mentions contaminates,,,, was the fuel filter dirty when changed,
if running tank right down could be sucking up crud from bottom of tank
Yup I was aware where they were, and that in some form they trigger the actuator, but just wasn't 100% sure. Not sure on fuel filter, as I didn't ask after nissan replaced it during last service.

Quote Originally Posted by mudski View Post
Like TD said. Clean the MAF. But if its foobar the cleaner will do jack. What mods have you got besides the zorst? Daes and needle valve? EGR block?
Could be a number of things. A vacuum leak may cause this but a Faulty MAF could too....
Nothing except the 2.75 beaudesert exhaust. Other than that engine is stock as rock.

Quote Originally Posted by Clunk View Post
But wouldn't a decrease in back pressure from having a larger diameter exhaust do this?
Sure would, but why is it intermittent, is what I'm curious about.

There could be a whole range of potential issues here at play. Like I said above, nissan suggested clutch helper is controlled by vaccum and issues with hoses could be the issue, but they didn't have a look. Also, after my exhaust was fitted, I had the car looked at for a potential exhaust or manifold leak, but nothing's come out of that.

I just took the car for a spin just then, for about 15 minutes to grab a pizza, and she absolutely flew... Maybe it likes the dark.