i know the diagrams are up at the top in a sticky, please dont flame me!

i have been putting it off because ive heard bad things about the cutoff valve killing engines. how likely is that to happen? i could most likely install it myself, but i am afraid that i will futz it up and ruin a perfectly good low mileage engine!

it should be said that when i did the brakes i could NEVER get those little plates to sit the right way and i had t keep flipping and turning thm till my daddy came and helped

so now that youall know my "i dont know which way is up" issue, should i attempt this fix myself? what would a dealer/indy charge for the job? the risk isnt worth the couple hundred i wouldnt think!

also-- autozone rents vacuum testers? my dad said he has one, but im almost sure he wont have an adapter thatll fit, hell, im not even sure its te right kind of vacuum tester!

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Look, Mityvac vac testers are only $28 to $32 bucks. You are required by law to have one if you own one of these old MB's.
I would suggest adult supervision until you become more experienced, however vac testing is very straightforward. That being said, if you replace the vac. shutoff valve on IP I would recommend help from someone who has some experience. You don't want the engine running away.
But basic testing should be no problem....


IP Injection pump shut off shutoff replacement

__________________
Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John

I've heard people talk before about these engines "running away" and getting ruined, don't they all come with the emergency cutoff switch on the throttle linkage?

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"I would rather be ashes than dust!
I would rather that my spark should burn out in a brillaint blaze
than it should be stifled by dryrot.
I would rather be a superb meteor,
every atom of me in magnificent glow,
than a sleepy and permanent planet.
The proper function of man is to live, not to exist.
I shall not waste my days in trying to prolong them.
I shall use my time."

-Jack London 1876-1916

1983 300CDT (running WVO since 12/05)
1981 300SD (parts car)

problem being, my stop lever doesnt stop the engine

lately ive just had to turn the a/c on max and it cuts off normally

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OK first.

what car?

We really need to know year and model.

I think you have solved 90% of your trouble shooting. You said that your engine stops normally when you turn on your AC system. When the AC system is off it routes the vacuum thru the airswithces and then to elements. By turning your AC on your "disconnecting" certain units and lines.

If we knew the year and model we could help more.

Dave

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1970 220D, owned 1980-1990
1980 240D, owned 1990-1992
1982 300TD, owned 1992-1993
1986 300SDL, owned 1993-2004
1999 E300, owned 1999-2003
1982 300TD, 213,880mi, owned since Nov 18, 1991- Aug 4, 2010 SOLD
1988 560SL, 100,000mi, owned since 1995
1965 Mustang Fastback Mileage Unknown(My sons)
1983 240D, 176,000mi (My daughers) owned since 2004
2007 Honda Accord EX-L I4 auto, the new daily driver
1985 300D 264,000mi Son's new daily driver.(sold)
2008 Hyundai Tiberon. Daughters new car

1979 240d automatic

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so what vacuum system components can i rule out as causes seeing as the a/c cuts off the car?

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That tells you first of all that your IP shutoff is fine, it just doesn't get enough vacuum until you turn on the AC. What is happening is whatever is leaking is being deactivated when you turn on the AC. Kind of an accidental bypass. Sometimes folks have to lock their doors to get their car to shutoff.
Get a Mityvac. Study the vacuum diagrams. Follow your vac lines from pump to firewall and into car. Systematically rule them out. At the firewall, usually brown is to key switch, then from keyswitch back to IP shutoff. Solid yellow is door lock. Green is climate control. Problem is, I don't know about your particular car. 240's usually have manual AC controls, so.....
We cannot tell you "Hey, this is what it is". We can only equip you with enough info for you to find it yourself. Fair enough??
Keep us posted.

__________________
Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John

i understand=)

i'll track down a mity vac and see what i can do, im almost positive it is the key switch, it is very loose.

i'll let ya'll know=)

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