Vacuum pump? Why does it buzz every 10 seconds? [snappic] - ZR-1 Net Registry Forums

Schrade · 01-13-2013

edit:
Mr. Dynomite said it's a normal function, SO, can some rubber bushings / washers be fab'bed to re-mount this pump, and create a 'buffer' effect and possibly reduce the noise???
__________________________________________________ _________________________

Where is the snooze button on this guy? He buzzes for about 1 - 2 seconds, every 12 - 15 seconds.

Is a fault or error indicated? Whatever it is, I can'T pin the rap on the shop that did the tranny - it did it before...

Only DTC I've seen was for voltage to LED cluster...

Schrade · 01-13-2013

Thanks there Sir...

(didn't know what to look for in FSM

)

ghlkal · 01-13-2013

Quote:

Originally Posted by Schrade

edit:
Mr. Dynomite said it's a normal function, SO, can some rubber bushings / washers be fab'bed to re-mount this pump, and create a 'buffer' effect and possibly reduce the noise???

As Cliff said, this is normal.

Can you actually hear the pump when driving? If so, increase the revs until you can't hear it anymore ...

Schrade · 01-13-2013

Quote:

Originally Posted by ghlkal

As Cliff said, this is normal.

Can you actually hear the pump when driving? If so, increase the revs until you can't hear it anymore ...

No Sir - can't hear it while driving, but I can just hear it while idling.

So if I TIME the intervals, I can guage a vac. leak? Does the interval have a normal spec time? Such as for a new motor? Is it in FSM?

I don't have a loping idle, which is usually a tell-tale indication of intake leak...

And is the ground for the vac pump integrated into the mount? I'd really like to fab up some cushion into mounting bushings...

Fully Vetted · 01-13-2013

Quote:

Originally Posted by ghlkal

...increase the revs until you can't hear it anymore

That's otherwise known as the HGIH or High Gear Indicator Hum. It's an indicator that you are at least 2 gears too high.

Blue Flame Restorations · 01-13-2013

Remove the secondary system and it'll be as quiet as a ZR-1!!! Seriously, remove them. Glad I did.

ghlkal · 01-13-2013

Quote:

Originally Posted by Schrade

So if I TIME the intervals, I can guage a vac. leak? Does the interval have a normal spec time? Such as for a new motor? Is it in FSM?

I don't know what "normal" should be. Mine starts up every 15 seconds or so like yours. Marc H told me that as long as the pump shuts off for a few seconds then it is "in specs."

scottfab · 01-14-2013

This is not normal. 10sec is too short of an interval.
It's easy to get it to 30sec or more.

DON'T rip it all out !
Just fix it like you would a burned out light bulb.
You also should not trade the car in for a new one
when the ash tray is full.

Start with the basics.
Find the hard plastic hose that comes out of the pump and
pull it out. Then put you finger over the side coming from the pump.
It should run a bit then stop for an indefinite period of time.
Report back then we can direct you to the next step.
(or find the old thread that covers this to send you too)

Blue Flame Restorations · 01-14-2013

Or just remove it and never have to worry about it again

On a side note------I did the Ash Tray Relocation mod and put it in the center console for quarters for the car wash. No ash tray, no temptation to sell the car........

WVZR-1 · 01-14-2013

You also have a cruise that doesn't work so I wouldn't panic regarding this. From the appearance of some of the install, the fact that they did a "pedal swap" I'm quite sure you'll find solutions in your search. You might check and see if your CHMSL works. They may have not understood the function of the switch that does the vacuum for the cruise and the 12V to the CHMSL!

You might have a few more surprises.

Patience!

01-13-2013	#1
Schrade Join Date: Dec 2012 Location: NC Posts: 1,786	Vacuum pump? Why does it buzz every 10 seconds? [snappic] edit: Mr. Dynomite said it's a normal function, SO, can some rubber bushings / washers be fab'bed to re-mount this pump, and create a 'buffer' effect and possibly reduce the noise??? __________________________________________________ _________________________ Where is the snooze button on this guy? He buzzes for about 1 - 2 seconds, every 12 - 15 seconds. Is a fault or error indicated? Whatever it is, I can'T pin the rap on the shop that did the tranny - it did it before... Only DTC I've seen was for voltage to LED cluster... Last edited by Schrade; 01-13-2013 at 09:22 PM.

01-13-2013	#2
Schrade Join Date: Dec 2012 Location: NC Posts: 1,786	Re: Vacuum pump? Why does it buzz every 10 seconds? [snappic] Thanks there Sir... (didn't know what to look for in FSM )

01-13-2013	#6
Blue Flame Restorations Join Date: Feb 2010 Location: Pendleton, IN Posts: 3,904	Re: Vacuum pump? Why does it buzz every 10 seconds? [snappic] Remove the secondary system and it'll be as quiet as a ZR-1!!! Seriously, remove them. Glad I did. __________________ 1988 KOH Prototype EX5023 sold 1990 ZR-1 #444 Convertible 1990 ZR-1 Black #966 1991 ZR-1 Quazar Blue #296 1957 Duntov SS Project

01-14-2013	#8
scottfab Join Date: Jan 2009 Location: Portland Oregon metro area (Washington side) Posts: 3,207	Re: Vacuum pump? Why does it buzz every 10 seconds? [snappic] This is not normal. 10sec is too short of an interval. It's easy to get it to 30sec or more. DON'T rip it all out ! Just fix it like you would a burned out light bulb. You also should not trade the car in for a new one when the ash tray is full. Start with the basics. Find the hard plastic hose that comes out of the pump and pull it out. Then put you finger over the side coming from the pump. It should run a bit then stop for an indefinite period of time. Report back then we can direct you to the next step. (or find the old thread that covers this to send you too) __________________ Scott Vett owner since 1979._It's about the car and the people

01-14-2013	#9
Blue Flame Restorations Join Date: Feb 2010 Location: Pendleton, IN Posts: 3,904	Re: Vacuum pump? Why does it buzz every 10 seconds? [snappic] Or just remove it and never have to worry about it again On a side note------I did the Ash Tray Relocation mod and put it in the center console for quarters for the car wash. No ash tray, no temptation to sell the car........ __________________ 1988 KOH Prototype EX5023 sold 1990 ZR-1 #444 Convertible 1990 ZR-1 Black #966 1991 ZR-1 Quazar Blue #296 1957 Duntov SS Project Last edited by Blue Flame Restorations; 01-14-2013 at 09:30 AM.

01-14-2013	#10
WVZR-1 Join Date: Oct 2004 Posts: 1,889	Re: Vacuum pump? Why does it buzz every 10 seconds? [snappic] You also have a cruise that doesn't work so I wouldn't panic regarding this. From the appearance of some of the install, the fact that they did a "pedal swap" I'm quite sure you'll find solutions in your search. You might check and see if your CHMSL works. They may have not understood the function of the switch that does the vacuum for the cruise and the 12V to the CHMSL! You might have a few more surprises. Patience!