[Richard930]

Originally Posted by JFairman

Paul, there's an easy way to stop the weird gauge rattle. You make a little air flow resistance damper and stuff it in the hose.

I took a 1" long piece of 10 gauge wire or whatever thickness it was that fit snug in the vacuum hose. Then stripped a 1/4" of insulation off one end and pulled some of the copper wire strands out with needle nose pliers but left most of them in there so there would be enough room for some air to move by the copper wire strands but still have some resistance to air flow through the piece of wire. Just enough to slow down the movement of air in the hose a little bit.

I stuffed it into the hose at the end that goes on the gauge while sitting in the car and it worked! The gauge needle still climbed up as fast as before when boost came on and there was no more faint gauge rattle at certain low RPMS and throttle position/intake manifold vacuum scenerios.

You could do the same thing with a little piece of cotton and stuff it into the hose with a phillips head screwdriver or small bolt and it would probably work just as well when you got the right amount of cotton in there.
Stuff too much in and it might slow down the gauge movement too much. Then you'd have to blow it out with compressed air to get it out and try again with less cotton.
Try it, I think you'll like it!

The rattle has been driving be nuts and NHS hasn't been able to suggest anything more that 'putting a kink in the hose' which hasn't done anything. Thanks for the suggestion, I'll give it a try as I've been close to ditching the gauge and putting the clock back in..