Greetings,

I'm trying to solve my problem of the engine running after taking out the ignition (I've really search). I know I probably have a vacuum leak, but that round thing on top of my IP has a little nipple that looks like it could be a vacuum hose connection. It doesn't have anything on it, and if it should where would the other end of the connection be? It's raining here in the South. Thanks.

Hugh Sr.

ALDA? I think it is square based with a round top. Try searching on ALDA. You get crappy performance with it unhooked, but it should not stop you from running or starting.

-Jim

__________________
1995 S350D, Green with black leather interior.
Bought January 2008 w/ 233,xxx miles.
I did 22,000 miles during the first year of ownership.

Sorry, reread you post.

There should be a brown vacuum line that runs to the shut off valve on the IP. I believe the vavle is round. No Vacuum, no shut off.

The line starts on the left fender and goes over to the IP.

Jim

__________________
1995 S350D, Green with black leather interior.
Bought January 2008 w/ 233,xxx miles.
I did 22,000 miles during the first year of ownership.

Kindly read this thread for assistance on how to structure a post on M-Shop.

http://www.peachparts.com/shopforum/showthread.php?t=127342

Not positive on the turbo cars, but on the non-turbos that is a diaphragm that automatically adjusts the fuel sent to the injectors based on altitude. It does not get a vacuum line and is intended to be vented to the atmosphere.


The tin can on the rear of the pump is what shuts off the motor. It too is a diaphragm and vacuum is applied to pull the fuel rack in the pump and shut the fuel off. So a not stopping engine is due to a leak in the diaphragm or a lack of vacuum to it. A vacuum leak could be anywhere from the vacuum tap at the brake booster line, through to the small valve attached to the ignition switch, up to the diaphragm.

The VCV valve is also round. Knowing what year and model of car you have would be helpful as well.

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RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

99 W210 E300 Turbo Diesel, chipped, DPF/Converter Delete. Still needs EGR Delete, 232K

90 Dodge D250 5.9 Cummins/5 speed. 400K

Gone and still missed...1982 w123 300D, 1991 w124 300D

Need an little bit more info, What car, what year etc.

__________________
1983 300SD
200000miles

To all those that took the time to answer my question: I apologized for not following the forum rules. A rain drop must have landed on my head.

I have a 1984 190d, and she has 92,840 miles. The nipple I mentioned is about 2:00 on the round thing. My last major work-in-progress project was to install Bilstein's on front & back.

Thanks,

Hugh Sr.

well it's good that you got that rain drop cleared.
the above advice is still good. follow the brown line from the IP to the ignition switch, looking for leaks. the first thing I would do would be to test the vacuum system to see if it's putting out vacuum in the first place. then I would disconnect the brown line from the IP and apply vacuum to it while the car is running to see if the shut off was working. then I would start looking for vacuum leaks, or start plugging off systems until the shut off started working. the most common place for leaks is right there in the engine compartment with all the tees and fittings exposed to engine heat. second most common is in the door locking system. plug off the bright yellow lines first and see if that gets the shut off working.

__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

vstech,

I had a 1968 Camaro SS, 350- back in 1970.

Hugh Sr.

List year and type of car in your signature profile please! This is NOT a chat room. We are here voluntarily to help repair cars not discuss our favorite cars. Sorry for the rant but I waste too many min. trying to understand mis spelling or guessing on type of car and year. Some weeks I dont even log on for those reasons. You were provided the link to give a better post but it appears you chose to ignore it.

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81 300CD (sold) 1972 280 SEL 4.5 (sold) 1966 250 S 4 spd (sold) 1974 450 SL (sold) 86 BMW 325ES (sold), 1973 280C (sold) 1988 300 SE.

If you are talking about a brass colored round thing that sits next to the square thing on top of the injection pump, then you are talking about the shut of valve. the shut down system has four pieces, a vacuum line going to the dashboard and connected to the shut off switch attached to the key switch, a vacuum line going from this switch to the shut off valve on the IP.

If you do not have a line on the shut off valve, look for one that is brown in color that runs from the firewall to near the IP. That is the line you need to connect. If it is connected and the car does not shut off when you turn the key, disconnect it and put a vacuum gauge on the line. When you turn the key to off (engine running) you should get abpporx 22 PSI of vacuum at the end of the line. If you do not get that, check the vacuum lines and the switch in the dash (PITA to get to)

If you get the vacuum at the end of the line, try this. Take a clean piece of hose and attach it to the shut off valve. With the engine running, suck on the other end of the hose and watch the stop lever. It should move towards the off position. If you can suck really hard and get the car to shut off, it is probably a leaky valve. If you have a Miti-Vac, you can use it to create vacuum on the end of the hose. The MV will not generate the same amount of vacuum as your lungs so if you are pumping the MV and the stop lever kind of wobbles the valve is bad.

I just replaced the SOV in the 300SDL and it was a pain getting it out without taking the intake manifold off. I did it though by taking the Xover pipe off and yanking the ALDA (square thing near the SOV)


Good Luck!

__________________
"I have no convictions ... I blow with the wind, and the prevailing wind happens to be from Vichy"

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