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What cars can I pull an electric vacuum pump from?
I need a vacuum pump to help out the braking system on one of my vehicles that doesn't make enough vacuum. I see in the below link that passats have them...not sure why but that doesn't matter. Do you know where it would be on a passat? What other vehicles have them and where are they under the hood. I might just go to a bone yard tomorrow
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07-07-2012, 02:17 PM
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07-07-2012, 02:17 PM
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I'm with Bill
Join Date: Jun 2005
Location: Scottsville Va
Posts: 24,186
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Why are you low on vac?
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Electrical problems on a pick-up will do that to a guy- 1990C4S |
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07-07-2012, 02:20 PM
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Well I can't say if I'm low but I want to try a little more and see if that helps or whether the truck ate another booster.
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07-07-2012, 02:37 PM
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I'm with Bill
Join Date: Jun 2005
Location: Scottsville Va
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Just put a vac gauge in the line going to the booster. If you have around 20 inches you are good and the truck ate another one.
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Electrical problems on a pick-up will do that to a guy- 1990C4S |
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07-07-2012, 02:43 PM
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Ok good tip. I guess its most wise to do that. I know if I let it idle for a while it will make good vacuum (its a diesel with a mechanical vac pump) but usually I have to pick up on the pedal after pushing it down. Everything in the system is new.
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07-07-2012, 02:57 PM
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07-07-2012, 03:44 PM
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You do not have permissi
Join Date: Aug 2001
Location: midwest
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"Vacuum takes a while to build up"? Hmm.
Rings not seating? Could the PCV or other check valve do this? Check another manifold vac source while cold. |
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07-07-2012, 04:04 PM
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I'm with Bill
Join Date: Jun 2005
Location: Scottsville Va
Posts: 24,186
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A diesel doesn't build vac from the engine, so it has a separate pump. Fords are famous for having the diaphragm in the pump fail, it is belt driven
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Electrical problems on a pick-up will do that to a guy- 1990C4S |
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07-07-2012, 04:10 PM
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my 79 300d has one.
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07-07-2012, 05:58 PM
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The vacuum canisters are really small and designed for carbs...I already bought one.
The stock pump is a vane ppm I believe so I doubt it can wear out in my lifetime but I don't think it was ever that good. Where under the hood of an old Benz would I find the electric vac pump? |
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07-07-2012, 06:45 PM
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Sorry, I missed the big "electric" in the post title. Mine is mechanical. Back in the day i got one from a speed shop, I had a 69 GTO with a 400 and a really lumpy cam.
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07-08-2012, 10:45 AM
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Ford diesel 4x4 trucks have them...
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07-08-2012, 02:06 PM
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Quote:
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07-08-2012, 02:44 PM
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Location: London Ont Canada
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If you have a power steering pump ,why not switch the brake booster to "hydroboost" ? Leave the weak vac pump for the HVAC controls.
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07-08-2012, 04:26 PM
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Hydroboost is another thing thats on my mind. For now it seems cheapest to 1. test my current vac pump output; 2. install a reservoir if I can find one with large hoses instead of carb hoses; and 3. install a junkyard vacuum pump so long as I can find out if they ever shut off via a vac switch or just keep running?
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07-08-2012, 07:12 PM
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Just put a vac gauge in the line going to the booster.
 
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07-08-2012, 07:30 PM
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1979 Porsche 911SC
