Vacuum pump...

[qwerty123]

Hi guys, just wondering, I have removed my ebpv and plugged the hose but the jacking capsule is still in place. can it be removed without affecting anything else?

Also, my vacuum pump is apparently playing up, I suspect I will need a new one but are they fixable?

Do they only control the cabin hot/cold vents in the front (other than the emissions rubbish) or can it be removed. It's in a race car so not essential to have cabin heating (although I would prefer to keep it frankly)

 

[sailorbob]

The throttle jack actuator can be removed. With your EBPV actuator removed too this means the vacuum pump only controls part of the HVAC system. There are two actuators that need the vacuum pump; the fresh air / recirculation flap and the mode flap that directs the air to the face vents or through the heater matrix.

Edited June 26, 2014 by sailorbob

[Vulcan Grey]

Sorry Qwerty123, but I can't remember what spec your car is...

 

Or if your car has the GM Powermaster III ABS system or a normal manual master cylinder, with or without vacuum booster...  But if you have the non ABS system with vacuum boost, then your vacuum pump also provides vacuum for the brakes.  The GM ABS unit does not use vacuum for the brakes.  The later Kelsey Hayes for the GT3 and V8 does use a vacuum booster and require a source of vacuum (electric pump on the GT3 and plenum sourced on the V8).

 

The mechanical vacuum pump on the pre-power steering cars is pretty cheap to replace.  In the States we buy the NAPA 64-1006 part (it fits many FORD trucks, gas and diesel from the late 80's and early 90's).

[dodge1979]

The vacuum pump can go out of adjustment and is very easy to readjust. It can take..what 10mins? You may have a vacuum leak if you find its running constant or too often

[qwerty123]

Thanks for the replies so far, it's a 94 S4, with the rubbish abs, not KH...

Geoff put his finger over the outlet (?) and it kind of cycled on/off I seem to remember. He said it was fubar'd. I wonder if I can adjust it or it needs binning.

Edited June 26, 2014 by qwerty123

[sailorbob]

No idea if it's serviceable but it's the same unit as used on the Lotus Carlton and other GM vehicles.

[superdavelotus]

Hi Qwerty,

 

 

It's a bit of a long shot but is your name Dom by any chance?

The vacuum pump can be fixed in a few minutes as yours appears to be working and just won't shut off. Prize off the top of the vacuum pump, taking care that there are some thin wires underneath the cover you are taking off. Once you have done this, under the cover where the vacuum port is located should be a pressure switch with a little grub screw. Turn this clockwise I think half a turn and try this on your car. You can connect the vacuum pump with lid off I think to keep adjusting screw. Once the pump cycles off and works again when it needs to then you have fixed it!

It's been about 10 years since I last stripped one down so the instructions are a little sketchy.

I hope this helps

 

 

David Walters

[qwerty123]

Cheers Dave

Dom

Edited June 27, 2014 by qwerty123

[superdavelotus]

Hi Dom,

 

It's been years since I last bumped into you, was it Autosport Show one year?

How's it going? I see the Esprit is now a race car!

 

 

Regards,

 

 

 

David Walters

[fflyingdog]

Hey Dom

   Are you sure one of your disconnected pipes are not leaking ? Hope all your lot are well.

 

    Cheers

        Nick

[dodge1979]

As dave says..dead simple job

[qwerty123]

Dave, it was probably Donnington when we last met, ages back. The car is indeed a racer but a bit redundant at the mo, annoyingly.

I'm supposed to be racing in the RAF MSA series (all 3 races!) and bolstering it with the Aston Owners Club Intermarque and maybe a few other invited. So much for that, missed one RAF and several Intermarque meets already, haven't seen the business end of a racetrack since last year...

Nick, I've just thought, my exhaust at the turbo join is leaking a bit of gas, this may not help much.