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  #1  
Old 05-10-2010, 03:21 PM
Hip001's Avatar
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HELP! Vacuum troubleshooting! Car will not turn off!

Thank you for your time! I have a 1984 300d with 312k miles

I see the sticky showing the vacuum diagrams but for some reason they will not display for me.

Can someone explain what is the proper step by step process to trouble shoot the vacuum system. I pulled the line off the brake booster and there is vacuum on that line but is it too little? anything farther I do not know what/where to check. I know I have a right rear door not locking so I suspect this as a leak and it will not blow from the center vents so I know I have a issue there too. It use to shut off with the key now it will not.

Thank you for your help!!

Hip

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2006 Jetta TDI DSG 320k miles
1997 Ford F150 325k miles 4.2L V6 "Work Truck"
2008 Tundra 225k miles 5.7L
1982 240D.....sold
1984 300D...Totaled OUCH!
1985 300D Turbo 222k miles "Dos" sold to 79Mercy
1986 300SDL 98K miles "The Beater"....sold
1987 190E 2.3 16v Euro spec 115K miles....sold
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  #2  
Old 05-10-2010, 03:34 PM
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hook the vac line back up comming from the booster wiht the key off and you car will stop
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1985 300D - 599,xxxk - blue interior #265 Monark Nozzle, AL129X, 15" Ronals, Gen II Big Brakes hunting
1985 300D - 491,xxxk - in prog-{A-A IC, 3" exhaust, psi\pyro, 28*BTDC, Hella Euros, IP Limiter removal
1985 300TD - 783,xxxk - parts car,used new engine with ALDA cap inplace
1987 Kenworth T-600 8LL 425 CAT Mech. - 6,000,000+k - DEI exhaust wrap, punched through resonators, 1 recent rebuild,
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  #3  
Old 05-10-2010, 03:43 PM
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Put a vacuum hose in place of the brown vacuum line going to your shut off valve on the back of the IP between the IP and oil filter housing. With the engine running give a couple of strong sucks on the hose. If the engine shuts down, this confirms your shut off valve is functioning correctly. Next, I would disconnect the yellow vacuum line from the system at the firewall above and to the left of the of the oil filter housing at the firewall. Then block off the hose it plugged into (at the front end) with a golf tee. This will remove your door lock system from the equation. If the car shuts off the withe yellow line removed and plugged, this proves a leak in the door lock system is lowering the vacuum level ehough to stop it from shutting off.
If it still won't shut off with the door locks disconnected, push the far right button on the climate control. This will eliminate a lot of the climate control vacuum pods. If it shuts off fine with the button pushed, it proves a leak in the climate control system is causing the problem. You could also try this before the door lock disconnection.
These are all test that don't require a Mity Vac.
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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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  #4  
Old 05-11-2010, 09:51 PM
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What should the vacuum be at idle with a gauge? i've done all these test it seems i have about 5" of vacuum mine will shut off at about 10" i have a rebuild vacuum pump..
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  #5  
Old 05-11-2010, 10:25 PM
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vacuum at a gauge should be 22" with everything working well, or with everything plugged off...
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  #6  
Old 05-11-2010, 10:30 PM
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Quote:
Originally Posted by vstech View Post
vacuum at a gauge should be 22" .
At sea level. Lower at altitude.
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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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  #7  
Old 05-11-2010, 10:49 PM
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true, but 5" UM no. something is seriously leaking or your pump is shot at those "pressures"
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  #8  
Old 05-12-2010, 12:31 AM
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Last time I checked.. there is NO altitude in Florida..
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1982 300D 202K
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1992 940T

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  #9  
Old 06-21-2010, 07:55 AM
Hip001's Avatar
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Had shutoff valve replaced and works fine but still vacuum issues. Left rear door not locking and hear hissing. And the ac won't blow out the center vents.
__________________

2006 Jetta TDI DSG 320k miles
1997 Ford F150 325k miles 4.2L V6 "Work Truck"
2008 Tundra 225k miles 5.7L
1982 240D.....sold
1984 300D...Totaled OUCH!
1985 300D Turbo 222k miles "Dos" sold to 79Mercy
1986 300SDL 98K miles "The Beater"....sold
1987 190E 2.3 16v Euro spec 115K miles....sold
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  #10  
Old 06-21-2010, 09:01 AM
Hip001's Avatar
Have you seen my stapler?
 
Join Date: Mar 2009
Location: Gainesville, Georgia
Posts: 422
Quote:
Originally Posted by kerry View Post
Put a vacuum hose in place of the brown vacuum line going to your shut off valve on the back of the IP between the IP and oil filter housing. With the engine running give a couple of strong sucks on the hose. If the engine shuts down, this confirms your shut off valve is functioning correctly. Next, I would disconnect the yellow vacuum line from the system at the firewall above and to the left of the of the oil filter housing at the firewall. Then block off the hose it plugged into (at the front end) with a golf tee. This will remove your door lock system from the equation. If the car shuts off the withe yellow line removed and plugged, this proves a leak in the door lock system is lowering the vacuum level ehough to stop it from shutting off.
If it still won't shut off with the door locks disconnected, push the far right button on the climate control. This will eliminate a lot of the climate control vacuum pods. If it shuts off fine with the button pushed, it proves a leak in the climate control system is causing the problem. You could also try this before the door lock disconnection.
These are all test that don't require a Mity Vac.
Thak you Kerry, I'll try this and see what happens.

__________________

2006 Jetta TDI DSG 320k miles
1997 Ford F150 325k miles 4.2L V6 "Work Truck"
2008 Tundra 225k miles 5.7L
1982 240D.....sold
1984 300D...Totaled OUCH!
1985 300D Turbo 222k miles "Dos" sold to 79Mercy
1986 300SDL 98K miles "The Beater"....sold
1987 190E 2.3 16v Euro spec 115K miles....sold
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