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Boost Gauge On Skyline R33

skylineGT
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Jden Enthusiast

Jden

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Have just purchased first skyline and i'm not sure if the boost gauge is reading right, it generally sits in the negative and only goes into positive boost when accelerating hard, is this normal?

That's what its supposed to do?

PM-R33 Grand Master

PM-R33

Posted
Posted (edited)
Have just purchased first skyline and i'm not sure if the boost gauge is reading right, it generally sits in the negative and only goes into positive boost when accelerating hard, is this normal?

That is the corect operation of a boost gauge. Under no load the intake pressure sits in a vacuum, demonstrated on the gauge as a negative pressure. Once the engine is under sufficient load and the turbo is "spooling" the pressure will go into a positive "boost" it will continue to climb until the wastegate cracks open and the boost will stabilise at a single value controlled by the wastegate/boost controller.

Have a read of this, good article to explain the basics.

http://www.howstuffworks.com/turbo.htm

Edited by PM-R33
skylineGT Rookie

skylineGT

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k, cheers for that i also wanted to check just below and to the left of the steering wheel there is a screw with a black cap on it that dosen't seem to do any thing is that just for securing some sort of access panel?

gotRICE? Veteran

gotRICE?

Posted
Posted
another question, is it common for the exhaust manifold nuts on cylinders 1 and 6 to come loose/ fall off, and is there a special nut/washer type to stop this?

Totally normal.

Just kidding dude. Maybe the studs are broken so they arent staying tight?

Best thing to do would be to find new ones and just put them on tight.... tight tight. Maybe even some threadlocker?

S1LV3RTRACKS Community Regular

S1LV3RTRACKS

Posted
Posted
Standard gauge isn't the best. Check the line for it hasn't cracked as they tend to do. It comes off the intanke manifold near the firewall, it's a 4mm black rubber hose

I had this issue. The rubber hose becomes brittle and cracks appear which messes up the factory boost gauge. I had some 4mm rubber vacuum hose lying around which I installed and all is fixed with the gauge. Very easy to fix.

CatsEyes Enthusiast

CatsEyes

Posted
Posted
I had this issue. The rubber hose becomes brittle and cracks appear which messes up the factory boost gauge. I had some 4mm rubber vacuum hose lying around which I installed and all is fixed with the gauge. Very easy to fix.

Yep, I had the same trouble. That little hose just gets brittle with age. Also causes a vacuum leak, which harms the boost as well.

A few bucks worth of hose from Autobarn should do it!

  • 4 months later...
seriesII Mentor

seriesII

Posted
Posted
Standard gauge isn't the best. Check the line for it hasn't cracked as they tend to do. It comes off the intanke manifold near the firewall, it's a 4mm black rubber hose

hi.. thought i would post here.

this hose for the stock clusters boost gauge, has came off, its still connected to the manifold, but it has came off at the other end, i pulled it and it came from behind the drivers guard.. so while ive had my guard off today, i have been trying to reconnect this, but i cannot find anywere it goes?, can some one lend a hand to were this connects back.. thanx

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