i recently posted i had problems with it not shuting off when you turn the key. I started going through the vacum system replacing cracked connectors and checking to make sure everything held vacum. Started it back up and now it revs to the sky with no signs of stopping and still doesn't shut off when you turn the key. Any insight on this would be great. I dont understand why the motor is reving with out the pedal or throttle moving. I would imagine its something to do with the vacum. If anyone has a shematic of the vacum layout it would be great because i cant seem to find any literature. Thank you any info is greatly appreciated

What year and what do you mean by sky-hi.

This is likely unrelated to the vacuum system, as the throttle is mechanically actuated, and has little to do with the vacuum system.

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Jovan

'84 (11/83) 190D 2.2 5-Speed; Silver/Blue; Motor No. 00354, 402k mi (340+kmi mine)

'89 Porsche 911 Turbo Coupe; Black/Black; 53kmi
'05 BMW 530i 6-Speed; 302kmi
'19 Range Rover; 30kmi

If you removed the vacuum shut-off actuator, you replaced it without engaging it properly in the IP.

Sixto
87 300D

sixto if by vacuum shut-off actuator you mean the plastic vacum valve on the top of the injector pump. Yes i replaced i thought it clicked in and when i put a vacum pump on it it shuts off the engine. jobah By sky hi i mean it revs like you put a brick on the pedal. I know the accelarator cable doesnt move the engine revs up all by itself like the injector pump just pushes the maximum amount of fuel it can all the time. Does anyone know how the injector pump is ran is it mechanical or some other way. Any more thoughts or ideas would be great Thanks to everybody that has responded so far your insight is great.

If you had the shutoff valve removed sixto is right. It is almost the only thing it could be. Something messed up in there. Symptom is exactly the same if valve installed wrong. I would not start the engine until carefully checked. Without a positive way to quickly shut it down. Could cost you the engine perhaps.

Mechanical.

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'98 E300 DT
'87 190D 2.5 turbo RIP
'92 S500 Sold
'03 3.2TL-S A-Spec

barry123400 The engine shuts right off when you push the stop lever on the injector pump. The thing is i didnt have this problem when i cahnged the shut off valve after the valve change the motor ran well it idled rough but smoothed right out at about 1000 rpm. Motor still wouldnt turn off when you turned the key but it idled. I then started to go through the various vacum lines and connectors and replacing any that didnt hold vacum. after changing a few connectors on the passenger side by the battery, i started the car and it ran right up. If i did install the shut off valve incorrectly can anyone give me the correct procedure to replace.

What year is your 190d. I forgot even though the injection pump is mechanical some may have an external idle control system incorporated. This is unlike our earlier cars and I forgot about this.

Since the shutoff change initially seemed okay. Get a vaccum diagram of your set up and check it out. Or on the continued effort to repair the no key turn off you might find the issue as well. If you do not own a mity vac the cheap brass one from harbour freight will do well enough.

barry123400 it is 1986 190d 2.5 non turbo. i just read the shut off valve install in one of the forums the pics they showed looked a little different than mine. They also said if the valve was installed wrong the manual lever would not shut the car off but mine does. I also wonder if maybe it is installed wrong and that i didnt have the problem because the valve was not getting vacum, but when i changged the connectors it started getting vacum and started having the problem. Do you kmnow if it is possible to get to the vacum valve on the igniton switch with out removing the entire dash.

You really need a mity vac type of device to further isolate your difficulty before even considering going further. It sounds like you still have vaccum problems as you originally thought.

Also some kind of shop manual to aid you would do no harm either. The majority of site users on the diesel forum have not owned one of your examples. I have not either. So I do not know for example if the injection pump has an external idle control setup or not. .

On my 240 D ...If the shutofff valve is attached wrong...it holds the rack full forward resulting in full throttle only....

The arm of the shutoff valve on mine has a little (L) shape on the end that fits into a slot in the rack slider mechanism.....inside the IP Gov assy.

If the shutoff valve is just pushed onto the IP Gov. Assy without hooking it in the slot... the (L) hits the end of the slider mechanism pushing rack forward ...(full throttle)

(L) can not pull rack to off position because it is not attached.....

Again this is on a 1980 240D ....yours may be similar....

It is possible to reach the vac shutoff key assy under the dash on mine.....remove knee bolster for access...

Also another test to see if your vac pod on the IP can shut off the IP is to suck on the line attached to the shutoff pod.....only takes about 5 inches of vac to pull the rack shut....
If this does not shutoff engine ...check attachment inside IP......

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1978 Yellow 300D (The Mustard Toad)
1980 Blue 240D (The Iron Toad)
1989 Grey Mitsu.4WD Mighty Max Pickup (Needs a Diesel transplant bad)

(Open the pod bay doors HAL)

The W201 190D has an electromagnetic idle control solenoid that does increase the idle speed. I don't think it has nearly enough travel to give full throttle, though.

Perhaps while working with the vacuum lines, something fouled one of the numerous throttle linkage pieces? How about a runaway cruise control actuator (that comment about being near the battery made me think of that).

There is only One way to install the Vacuum Shut Off Valve correctly on the
pump on the 2.5 5 Cyl.
AND the accused has already admitted to "Having the VSV Off the Pump".

Note: Being able to use the mechanical EMERGENCY shut off... DOES NOT MEAN
you've installed the VSV correctly!

DO NOT SCREW AROUND running this engine until you have POSITIVE proof
that you've installed the VSV correctly!!!

You have been exceedingly lucky (You have not had a "Runaway"...Yet!)

It will "Spool UP" much faster than you can stop it ...Don't even think about
using "Bolt Cutters" on the Injection Lines...By the time you've managed to
cut two ...It'll have "Launched" the #1 Rod...(Guess Where?).

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'84 300SD sold
124.128

Thank you guys for the info im going to screw around with this some more today. I have a vac pump it makes the vacum issues much easier to find. I will reinstall the vacum shut off and check to make sure it is installed correclty. as for the cruise control the linkage is missing going from the accelarator to the cruise control module so i dont think tat is it. JonL the electromagnetic idle control solenoid do you know where this is under the hood. also does anyone know where a manual of some sort for this car can be found neither hanyes od chiltons makes one and i have not been able to find any info anywhere. thank you guys for the help hopefully it will be runnig right soon as i can not wait to save some money on fuel.

ok i have reinstalled the vsv and am pretty sure it is in correctly. you can not see the hole it slips into once the valve is in but im pretty sure its in the proper way. the engine only runs away when the key is in the on position if you turn it to the off position it idles really rough but smooths out at about 1000 rpm. it seems to run pretty well when the key is in the off position. anymore help would be great has anyone delt with this issue before its really racking my brain does anyone have a blow up of the injector pump. im pretty sure that my motor is a w201 its a 2.5 5cyl im contimplating pulling the injector pump and putting the valve in with the pump out of the car are there rebuild kits avalible for this pump cause ill probably rebuild it while its out.