strange buzzing sound

[whitecobra98]

when i fire up the gn i get a loud buzzing sound (coming from the behind the speedo area), it goes on for quite a bit...i think i know what it is, just looking for another opinion

 

[SHADOWII]

If you step out ot the car does it sound louder? It maybe the header cracked?

 

[whitecobra98]

no its not a header crack..its a loud buzzing

 

[turbo nasty]

Powermaster running...trans pump buzz??

 

[earlbrown]

Any chance it's the buzzer telling you to put on the seatbelt?

I yanked mine out so many years ago I can't even remember where it was hidden under the dash.

 

[aminga]

Maybe it's the bee pillar

 

[Howling Mad]

Probably the powermaster running

 

[whitecobra98]

my guess is the powermaster also..never heard it that loud and running for that long....being winter I dont drive it that often but would that cause it?

 

[turbo nasty]

Switch, weak pump, etc

 

[TurboDave]

Open the hood when you hear it and listen in that area. That would tell you whether or not it's the powermaster.

 

[Joeld]

If she runs for more than 10 seconds or so amd if she runs just about eaxh time you hit brakes it maybe your accumulator ball or maybe pump bearings going south

But if running long time i bet ball

Is pedal soft?

Joel

 

[whitecobra98]

pedal is not soft but runs when I hit the brakes, no brake light illuminated

 

[TurboDave]

pedal is not soft but runs when I hit the brakes, no brake light illuminated

So, is the buzzing caused be the powermaster or not?

 

[Joeld]

How long does it run for?

And to poster's question above me does the powermaster sound like the buzzz?

 

[whitecobra98]

gonna pop the hood before i start it this time (sometimes it requires several well-placed punches to decide to open) trying to remember if it only runs when my foot is on the brake

 

[turbo nasty]

Try key on no start when checking PM

 

[turbo3.8]

The buzz sound u heard most likely is the pump cycling try to charge the accumulator ball , if its not holding charge n the pump motor comes on every 1-2 times u step on break replace the accumulator ball if that dose not fix it then u might even have a leaking proportioning valve in ur master cylinder the most important thing is to keep ur break fluid clean it should be clear not contaminated for ur PM system to last a long time .

 

[whitecobra98]

gonna try with key off, and ill check condition of fluid...powermaster is a reman with prob 5000 miles on it..if fluid is not clear, i will change it..thanks for all the help

 

[turbo nasty]

Deplete accumlator when checking fuid level

 

[Turbosix6]

Could be the transmission pump if the brake powermaster checks out ok.