| Why would my vacuum pump run? [message #300349] |
Mon, 09 May 2016 15:34  |
armandminnie
Messages: 864
Registered: May 2009
Location: Marana, AZ
Karma: 2
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I have a JC-4 aux vacuum pump and I have heard it running a little when driving very slowly and cold. I have a vacuum gauge and it is showing 15-18 inches so the engine is providing plenty of vacuum. The brakes work fine and I cannot make it happen by applying the brakes repeatedly. I think the vacuum sensor on the pump may be acting up. What do you all think?
Armand Minnie
Marana, AZ
'76 Eleganza II TZE166V103202
visit my gmc blog
click here to visit gmcws.org
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| Re: [GMCnet] Why would my vacuum pump run? [message #300371 is a reply to message #300349] |
Mon, 09 May 2016 18:46  |
powerjon
Messages: 2446
Registered: January 2004
Karma: 5
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Armand,
The JC-4 pump only puts out about 10”Hg at best, if your engine vacuum is in the 15 to 18”Hg then the JC-4 will not every come on until you vacuum drops to about 5”Hg. I have one on the bench that I have been testing to see how it works. It is probably OK as a backup up if you loose the engine, but not for augmenting the brake booster. I run one of the Astra Vacuum pumps that are no longer available and a complete booster system from Dave Lenzi which I run at 22”Hg. I also run the Lenzi adapter at the booster that senses the booster pressure and my pressure switch that controls my vacuum pump separate from the engine vacuum.
JR Wright
78 Buskirk Stretch
75 Avion
Michigan
> On May 9, 2016, at 4:34 PM, Armand Minnie wrote:
>
> I have a JC-4 aux vacuum pump and I have heard it running a little when driving very slowly and cold. I have a vacuum gauge and it is showing 15-18
> inches so the engine is providing plenty of vacuum. The brakes work fine and I cannot make it happen by applying the brakes repeatedly. I think the
> vacuum sensor on the pump may be acting up. What do you all think?
> --
> Armand Minnie
> Marana, AZ
> '76 Eleganza II TZE166V103202
> http://www.minniebiz.com
> http://www.gmcws.org
>
>
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J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan
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| Re: [GMCnet] Why would my vacuum pump run? [message #300377 is a reply to message #300371] |
Mon, 09 May 2016 19:16 |
Emery Stora
Messages: 959
Registered: January 2011
Karma: 4
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Senior Member |
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I also use the Lenze setup just as you have.
Prior to that I used the JC-4 pump but I always got about 15”HG from it.
I assumed that it was that low because I am over 5000 ft elevation. Don’t know why you only got 10”. Several others using it got about what I did. I suspect that you had a vacuum leak.
Emery Stora
> On May 9, 2016, at 5:46 PM, John Wright wrote:
>
> Armand,
> The JC-4 pump only puts out about 10”Hg at best, if your engine vacuum is in the 15 to 18”Hg then the JC-4 will not every come on until you vacuum drops to about 5”Hg. I have one on the bench that I have been testing to see how it works. It is probably OK as a backup up if you loose the engine, but not for augmenting the brake booster. I run one of the Astra Vacuum pumps that are no longer available and a complete booster system from Dave Lenzi which I run at 22”Hg. I also run the Lenzi adapter at the booster that senses the booster pressure and my pressure switch that controls my vacuum pump separate from the engine vacuum.
>
> JR Wright
> 78 Buskirk Stretch
> 75 Avion
> Michigan
>
>> On May 9, 2016, at 4:34 PM, Armand Minnie wrote:
>>
>> I have a JC-4 aux vacuum pump and I have heard it running a little when driving very slowly and cold. I have a vacuum gauge and it is showing 15-18
>> inches so the engine is providing plenty of vacuum. The brakes work fine and I cannot make it happen by applying the brakes repeatedly. I think the
>> vacuum sensor on the pump may be acting up. What do you all think?
>> --
>> Armand Minnie
>> Marana, AZ
>> '76 Eleganza II TZE166V103202
>> http://www.minniebiz.com
>> http://www.gmcws.org
>>
>>
>
>
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| Re: [GMCnet] Why would my vacuum pump run? [message #300397 is a reply to message #300377] |
Mon, 09 May 2016 22:10 |
powerjon
Messages: 2446
Registered: January 2004
Karma: 5
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Senior Member |
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No vacuum leak, running my vacuum test gauge connected right to the suction. The pump would never pull more than 10”Hg.
JR
> On May 9, 2016, at 8:16 PM, Emery Stora wrote:
>
> I also use the Lenze setup just as you have.
> Prior to that I used the JC-4 pump but I always got about 15”HG from it.
> I assumed that it was that low because I am over 5000 ft elevation. Don’t know why you only got 10”. Several others using it got about what I did. I suspect that you had a vacuum leak.
>
> Emery Stora
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J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan
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| Re: [GMCnet] Why would my vacuum pump run? [message #300413 is a reply to message #300371] |
Tue, 10 May 2016 09:54 |
GMC.LES
Messages: 505
Registered: April 2014
Karma: -2
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Senior Member |
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John, (and anyone looking for a decent vacuum pump)
The Ford Azure vacuum pump may no-longer be available, but I found a near identical pump that is readily available, and is an improved version.
Look for the electric vacuum pump from a 2010-2014 Ford F-150 with the ecoboost V6. This pump is identical in design except that they made the main body of composite material to eliminate corrosion. The original was highly prone to failure due to corrosion.
They can be found under the following Ford part numbers:
BL3Z-2A451-A
or
BRPV-10
eBay has them listed regularly for just over $200 new.
Info on how reliable the older aluminum versions are can easily be found when googling F150 ecoboost vacuum pump failures. The newer composite pumps appear to stand up to the environment a bit better.
Les Burt
Montreal
'75 Eleganza 26'
The EWIP (Eternal Work In Progress)
> On May 9, 2016, at 7:46 PM, John Wright wrote:
>
> Armand,
> The JC-4 pump only puts out about 10”Hg at best, if your engine vacuum is in the 15 to 18”Hg then the JC-4 will not every come on until you vacuum drops to about 5”Hg. I have one on the bench that I have been testing to see how it works. It is probably OK as a backup up if you loose the engine, but not for augmenting the brake booster. I run one of the Astra Vacuum pumps that are no longer available and a complete booster system from Dave Lenzi which I run at 22”Hg. I also run the Lenzi adapter at the booster that senses the booster pressure and my pressure switch that controls my vacuum pump separate from the engine vacuum.
>
> JR Wright
> 78 Buskirk Stretch
> 75 Avion
> Michigan
>
>> On May 9, 2016, at 4:34 PM, Armand Minnie wrote:
>>
>> I have a JC-4 aux vacuum pump and I have heard it running a little when driving very slowly and cold. I have a vacuum gauge and it is showing 15-18
>> inches so the engine is providing plenty of vacuum. The brakes work fine and I cannot make it happen by applying the brakes repeatedly. I think the
>> vacuum sensor on the pump may be acting up. What do you all think?
>> --
>> Armand Minnie
>> Marana, AZ
>> '76 Eleganza II TZE166V103202
>> http://www.minniebiz.com
>> http://www.gmcws.org
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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| Re: [GMCnet] Why would my vacuum pump run? [message #300426 is a reply to message #300413] |
Tue, 10 May 2016 14:57 |
Hal StClair
Messages: 971
Registered: March 2013
Location: Rio Rancho NM
Karma: -12
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If memory serves correctly, the corrosion issue was because of the mounting location on the Fords. Located out of direct spray as we can do on the GMC, the Azure pump should provide years of trouble free service.
Hal
"I enjoy talking to you. Your mind appeals to me. It resembles my own mind, except you happen to be insane."
1977 Royale 101348,
1977 Royale 101586, Diesel powered,
1974 Eagle Bus 45',w/slideout,
Rio Rancho, NM
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| Re: [GMCnet] Why would my vacuum pump run? [message #300431 is a reply to message #300413] |
Tue, 10 May 2016 15:59 |
powerjon
Messages: 2446
Registered: January 2004
Karma: 5
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Senior Member |
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Les,
Good find, a little on the pricey side even for the lower priced units. There are a number of VP’s what will pull 22”Hg or better for under $200.
or
http://tinyurl.com/jhdmgxc
and
or
http://tinyurl.com/jchaffb
There are a lot of units out there but you have to Max vacuum or capacity.
JR Wright
> On May 10, 2016, at 10:54 AM, Les Burt wrote:
>
> John, (and anyone looking for a decent vacuum pump)
>
> The Ford Azure vacuum pump may no-longer be available, but I found a near identical pump that is readily available, and is an improved version.
>
> Look for the electric vacuum pump from a 2010-2014 Ford F-150 with the ecoboost V6. This pump is identical in design except that they made the main body of composite material to eliminate corrosion. The original was highly prone to failure due to corrosion.
>
> They can be found under the following Ford part numbers:
> BL3Z-2A451-A
> or
> BRPV-10
>
> eBay has them listed regularly for just over $200 new.
>
> Info on how reliable the older aluminum versions are can easily be found when googling F150 ecoboost vacuum pump failures. The newer composite pumps appear to stand up to the environment a bit better.
>
> Les Burt
> Montreal
> '75 Eleganza 26'
> The EWIP (Eternal Work In Progress)
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J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan
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| Re: [GMCnet] Why would my vacuum pump run? [message #300448 is a reply to message #300426] |
Wed, 11 May 2016 08:51 |
GMC.LES
Messages: 505
Registered: April 2014
Karma: -2
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Senior Member |
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Hal,
I totally agree. When I originally looked for this info, I discovered that a large number of the problematic ecoboost installations appeared to be in the northeastern states and canada where salt is used. On a TZE that will rarely see bad weather driving, the aluminum bodied pumps will likely outlast the owner.
I also recall seeing a repair kit for these pumps that included a diaphragm, but can't find it now.
Les Burt
Montreal
'75 Eleganza 26'
The EWIP (Eternal Work In Progress)
> On May 10, 2016, at 3:57 PM, Hal StClair wrote:
>
> If memory serves correctly, the corrosion issue was because of the mounting location on the Fords. Located out of direct spray as we can do on the
> GMC, the Azure pump should provide years of trouble free service.
> Hal
> --
> 1977 Royale 101348,
>
> 1977 Royale 101586,
>
> 1974 Eagle Bus 45',w/slideout
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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| Re: [GMCnet] Why would my vacuum pump run? [message #300449 is a reply to message #300431] |
Wed, 11 May 2016 08:58 |
GMC.LES
Messages: 505
Registered: April 2014
Karma: -2
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Senior Member |
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The Ford pump is a bit pricey, but I have seen them under $200 on eBay occasionally. They sell fast at that price.
I think the best part of this is that they should be available in the men's mall for a fair bit less. One just needs to keep a sharp eye open for the composite model when picking.
Les Burt
Montreal
'75 Eleganza 26'
The EWIP (Eternal Work In Progress)
> On May 10, 2016, at 4:59 PM, John Wright wrote:
>
> Les,
> Good find, a little on the pricey side even for the lower priced units. There are a number of VP’s what will pull 22”Hg or better for under $200.
>
>
> or
> http://tinyurl.com/jhdmgxc
>
> and
>
>
> or
> http://tinyurl.com/jchaffb
>
> There are a lot of units out there but you have to Max vacuum or capacity.
>
> JR Wright
>> On May 10, 2016, at 10:54 AM, Les Burt wrote:
>>
>> John, (and anyone looking for a decent vacuum pump)
>>
>> The Ford Azure vacuum pump may no-longer be available, but I found a near identical pump that is readily available, and is an improved version.
>>
>> Look for the electric vacuum pump from a 2010-2014 Ford F-150 with the ecoboost V6. This pump is identical in design except that they made the main body of composite material to eliminate corrosion. The original was highly prone to failure due to corrosion.
>>
>> They can be found under the following Ford part numbers:
>> BL3Z-2A451-A
>> or
>> BRPV-10
>>
>> eBay has them listed regularly for just over $200 new.
>>
>> Info on how reliable the older aluminum versions are can easily be found when googling F150 ecoboost vacuum pump failures. The newer composite pumps appear to stand up to the environment a bit better.
>>
>> Les Burt
>> Montreal
>> '75 Eleganza 26'
>> The EWIP (Eternal Work In Progress)
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
_______________________________________________
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| Re: [GMCnet] Why would my vacuum pump run? [message #300466 is a reply to message #300431] |
Wed, 11 May 2016 16:08 |
Tony Cook
Messages: 121
Registered: August 2014
Location: Torrance CA
Karma: 0
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Senior Member |
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Perfect timing as I was just thinking of doing this mod very soon. I had seen these same ones that Powerjon posted has anyone used these I see its the same one Applied has listed . Are these fairly easy to install any pros/cons versus the JC4 as I cannot find those anyways. Thanks.
Tony Cook
77' Kingsley ' SuperSession 77 '
Torrance Beach,CA
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