Boost Gauge Question

[Brad-MSP]

Why does my boost gauge needle go crazy when i boost its not steady it shakes going up?

 

[Outlawstar98]

Im guessing you have a Mechanical Boost Gauge, Where do you have it T'd in at??

 

[sprinter119]

My gauge does the same thing its mechanical but my WGA is on it way out so who the hell knows.

 

[Brad-MSP]

its t'd in on the intake mani vaccum lines

 

[K. Soze]

I had the same problem. You have to find a vaccum source strictly for the boost gauge. If it shares with anything else, it will shake. I had mine T'd off my boost controller vaccum source and it shook. I gave it its own source and it's been working fine.

 

[Brad-MSP]

it has its own source...it still does it tho i got it on the right side if the main

 

[K. Soze]

I has something to do with the source. You might have to find somewhere else. Just make sure it's not even close to where your wastegate is sourced.

 

[speedracer]

sounds like you have a vac. leak.
I had the same prob. and found that the hard plastic vac. line
going to the gauge had a crack in it. I fixed the crack and fixed the jumpy needle. might not be in the same place as mine but deff. sounds like a leak somewhere.

 

[magnumP5]

Not necessarily a leak but there are a number of causes possible. Do you have a boost controller? Those bleed pressure to the wastegate actuator so there is a source for some fluctuation there. Due to the nature of the internal wastegate and its actuator it is unlikely you'll ever have a completely stable boost gauge needle.

 

[Brad-MSP]

Yes i have a boost controller but...its not on