87 GN Stock Boost gage> quit working

[Jeff Moore]

It's on a standard analog dash:

The little light is on ...but will not move under boost..

Where and What do I check...?

Thanks!

 

[scottyb]

First, don't rely on that gauge to be correct.

Check the vac line to goes to it's sender unit. It comes off of the vac block that's on top of the throttle body, routes toward the firewall on the passenger side, then truns on front of the AC/heater box and routes to the sender that's mounted above the passenger inner fenderwell. There's a good chance the hard plastic part of the vac line is broken, if it's the original.

 

[Jeff Moore]

Hey..thanks! also is there any elec checks that I should make?

 

[scottyb]

Well since you do have 1 light on, I made an assumption that the problem is not electric.