Boost Gauge Install?

[DaveyX87]

I did a search but couldn't find any info on this. I installed a boost gauge this afternoon and it doesn't work properly. Now my factory boost gauge does't work either. It's like I lost vacuum. It flickered when I revved the engine but it is not working correctly. I tried bypassing the T-valve to see if the factory gauge would work again but no dice. I thought I might have crimped the line somewhere. I guess I will go back to it tomorrow and trace the line.

 

[williamsGN]

Make sure you didn't pull it out of the MAP sensor on the passenger fender, which is what runs the factory gauge.

http://www.gnttype.org/techarea/bodygauges/bgauge2.html

 

[DaveyX87]

I checked the MAP sensor and the vacuum. Everything is working; no kinks anywhere. I still don't have any movement on my gauge unfortunately. Could be a bad gauge.

 

[SHADOWII]

If you have a mity-vac, you should be able to check the gauge w/it. Do you have any check valves in line that might be reversed?

 

[williamsGN]

Is the factory gauge working and did it work before ? If you have an air compressor with a pressure control valve, you can use that to test both gauges. Just keep the pressure down to 10 psi or so.

 

[DaveyX87]

The factory gauge did work before. It does not seem to be working now. I have only tried starting the car in the garage and revving the engine; I have not tried taking the car out on the street. I believe I should have gotten the needle to jump at least a little that way. Something is definitely not right. I will try your advice with the compressor. Thanks for all the help.

 

[williamsGN]

You will not build boost reving the engine. You could brake torque it and it should come up a few pounds.. wouldn't suggest doing it in the garage though

 

[DaveyX87]

You will not build boost reving the engine. You could brake torque it and it should come up a few pounds.. wouldn't suggest doing it in the garage though

Haha, I did try that at first but then I reconsidered. When the storm lets up I will take it out.

 

[DaveyX87]

Ok. I took the car out of the garage and everything is working. Thanks again for the help. Next I will be installing oil pressure and water temp gauges.