Stock BOOST gauge NOT WORKING....HOW to REPAIR???

[agteacher]

87 Grand National--digital boost gauge(stock)

Stock boost gauge does not show NO boost....when driving. The gauge is lighted BUT no digital movement when I "nail" the gas while driving. How to fix ....what to check ......WOULD like to keep the digital gauge(get it working). ... THEN install a pillar post pod gauge for CORRECT READING .
ANY HELP????
Thanks for the HELP...

Remenber...the Reason for the SEASON......CHRIST.

 

[Royal-T-Ltd]

Check vacuum lines - you probably have a leak... and i wouldn't "nail" anything until you get some working gauges and a scan tool because if you have a vacuum leak i'm sure your BLM are off as well. HTH

 

[8AV8]

boost gauge

caspers electronics can fix the stock gauge I believe. Google casperelectronics and give them a call

 

[Razor]

Confirm your map sensor is working. The green center wire should read 2.3 volts ignition on, then when pressure is put on the nipple, it should increase with pressure.

You can use a syringe, or bike air pump hooked to hose.. at 15 PSI pressure it should read 4.8volts. Just blowing in the tube should increase voltage to anout 2.7-2.8.

If the MAP voltage doesnt increase.. the sensor is bad and the guage will never read anything. If the voltage goes up..and the boost guage doesnt.. then the guage needs to be repaired.

HTH

 

[agteacher]

Thanks

Looks like I need a BUICK SHOP/SERVICE manual-----where can I buy (not a AutoZone --)------

Thanks!!!! for the infor.----I KNOW ---I will be asking more questions.

 

[salvageV6]

Helm Inc. for the factory service manual.

There was also a CD Rom version available on line too.

Do a search on this site with that topic, should bring up something.