Vk vacuum type cluster Help!

[johnvncommy]

Hello

My vk when idle reads arround 5000rpm??? when u put foot down goes all over place.. When u gun it goes straight to 1000rpms??

Is this normal or wtf?

[vkberlina]

Thats probably because you have a vacume guage not a tacho, you will notice the scale is in inches of mercury or Hg for short.

cheers
Scott

[johnvncommy]

hi
its an original cluster from another vk.. same as what was in it before... the part that reads your "power" is measured in vacuum x10kPa
its not a tacho at all .. now that im looking at it it says economy, vacuum x10kpa, and under number 1 it says power and is red and as you get up through the gauge it goes from red back to white. sort of the opposite as a rev meter which goes to red as you get up higher. does this make any sense to anyone?

[mightyredvc]

as vkberlina stated, it is a vacuum gauge not a tacho, and is most commonly called the useless gauge. it mainly lets you know that every thing is ok in the intake path. if it drops at idle to 2 or 3 it means you have a vacuum leak in the manifold or carb, or if it drops when breaking it can mean the booster is leaking. basically if its steady and reading about 5 or 6 at idle all ok. it's also supposed to help you monitor fuel useage, the lower the number the more fuel being used. hope this helps

[ari666]

ROFLMAO

how funny is that?

[johnvncommy]

Thanks everyone

My 1st vk so wasnt sure what the go was didnt understand the vacuum side of it.. Cheers mighty