Boost gauge quit working

Garys SC

Registered User
Anyone know why my boost gauge would just quit working??? (It sits on 0 all the time now.) There is no loss of power or actual boost.

Possibly a vacuum hose, or just a bad gauge??

Any ideas would be greatly appreciated!

Gary's SC

Gary
Charlotte, NC
 
Check the hose connections off the intake plenum...right after the lower IC tube at the top/left side of the motor, after the ACT sensor. Follow it back towards the firewall as best you can to be sure it is intact, not split, etc.

Then you'll need to check the hose where it connects to the rear of the instrument cluster. Speak up if you've never had that apart and need hints, etc. If all the connections are ok, you might suspect the gauge, but they're fairly reliable, I think.
 
If you place your head upside down in the floor boards you can see the boost gauge vacuum line and follow it into the driver side fender where it then makes its way to the SC stuff like KMT suggests. I'd start the car and then pull the line off the gauge. Advance the throttle a little and feel for vacuum (or measure it with a gauge)
 
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