Ignition Switch

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Shut-Off Valve
At Injection Pump
Pulls injection pump rack to stop.

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I like my "gorilla knob" No vacuum lines, just a direct cable to the fuel shutoff.

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1971 220D/4-speed ~250K mi. Family owned (dads side) through three generations since <5K miles.
1992 Chrysler LeBaron, 3.0V6 125K. Family owned (moms side) through three generations since new.
1977 Chevy Camaro Continual hotrod project
1970 Cadillac Sedan DeVille 472ci and nearly 19' long
1974 Fiat Spider Still needs work

Couldn't you just give the rubber fuel line a good yank? or maybe cut it? seems like that would be a bit quicker than loosening the injector lines.

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"spreading a trail of obnoxious where ever we go"
1981 300sd w/ 341,500 miles

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No.
The sad truth is that the fuel filter/injection pump fuel volume is enough to scrap the engine.

Total time from runaway to scrap metal = seconds.

BluEyes,

If the engine is sucking in crankcase oil, your Gorilla Knob won't do a thing.

P E H

No, it wouldn't.
But, letting my foot off the gas will severely restrict airflow. I honestly doubt my engine could get enough air to continue ignition at >4000rpm with the throttlebody virtually closed (this only applies to those of us with pnuematic governors). But to be sure, braking to a stop without pressing the clutch will kill the motor.

__________________
1971 220D/4-speed ~250K mi. Family owned (dads side) through three generations since <5K miles.
1992 Chrysler LeBaron, 3.0V6 125K. Family owned (moms side) through three generations since new.
1977 Chevy Camaro Continual hotrod project
1970 Cadillac Sedan DeVille 472ci and nearly 19' long
1974 Fiat Spider Still needs work

Holy ****! I just had a nice little runaway of my own. Ive been working on my 300SD '79, and just got it started. Suddenly, it went ROAAAAARRRRRRR!!!!

Good thing I read up in this forum beforehand - I had the air cleaner/ducting away from the turbo and I used my Chiltons to choke out the motor. Truthfully, thats been about the only thing that the Chiltons is good for!

I just had the pump out BEFORE this happend, so I removed the shutoff solenoid and ensured that it was latched appropriately. I threaded the hook portion through the eye of the lever inside and re-installed it. Also, before I re-installed it, I applied vacuum to the switch and it seemed to move like it should..... I dont really know why it ran away

Read post #28.

I have to wonder about the positioning of the shut-off hook. Just like you I also took great care to install the hook in the notch and I also had a run away! Pretty scary, bet you were a little shook up. You now have joined the ranks of the few, the not so proud, and the bewildered.

To this day I have the hook on the shut-off in front of the rack, NOT IN THE NOTCH. I still have bad dreams about this.

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79 240D (no name yet) 203K Miles Maple Yellow
98 2500 4x4 HD Dodge 24 Valve Cummins TD
83 Chevy Van (Dead-Trans. shot)

ITS ALIVE!!! Well, sort of. It runs and barely idles but makes some NASTY smoke. It needs to be tuned I think.

Note to everybody - If you have a '79 300 SD, the hook inside the IP DOES NOT GO IN THE HOLE. It goes forward of it so that it can pull it back. If you put this little doohickey in the hole you will have a nice little runaway.

Add a 1979 240D to the list of vehicles where the hook does not go in the hole but FORWARD of it.

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79 240D (no name yet) 203K Miles Maple Yellow
98 2500 4x4 HD Dodge 24 Valve Cummins TD
83 Chevy Van (Dead-Trans. shot)

apologies in advance for being dense.



I just read this entire thread and for me its still not clear what exactly the procedure is when you encounter a runaway event while driving.


1. brake and try and slow the car
2. do or dont put into park? If no then what keeps the car stopped while you try and turn it off with the co2 extinguisher?
3. turn off with key (it will keep running?)
4. open hood then use c02 extinguisher in the air intake?


also why cant you just use the shutdown lever on top of the engine?

Remove the air cleaner assembly so you have direct access to the air intake manifold. If you have a run away, place a object over the intake to shut that beast down. I used a phone book. DO NOT USE YOUR HAND OR OTHER BODY PART!

While driving, stall with clutch and brake if possible, dump CO2 extinguisher into intake or cut fuel line. I would not put in park if you have an automatic.

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79 240D (no name yet) 203K Miles Maple Yellow
98 2500 4x4 HD Dodge 24 Valve Cummins TD
83 Chevy Van (Dead-Trans. shot)

Putting the transmission in neutral or park is a better end result than killing yourself. If you try to use the brakes to control it, and they start fading at all, immediately disengage the drivetrain and let the engine go. You can always get another car.

Cutting the fuel line will not help at all, unless it's your IP causing the runaway. That's usually not the case.

I agree with your first statement completely, not so in the second. This thread deals with a run away motor caused by problems with the IP(incorrect shut-off valve installation). Perhaps your thinking stuck or jammed throttle linkage. In any case starving the motor of air or fuel should do the trick.

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79 240D (no name yet) 203K Miles Maple Yellow
98 2500 4x4 HD Dodge 24 Valve Cummins TD
83 Chevy Van (Dead-Trans. shot)

If this happens while driving = there are three possible answers:
#1. Pull to the shoulder of the road, park and escape the car as it self destructs.
#2. Carry a Co2 extinguisher in the passenger compartment at all times, pull to the shoulder of the road, park, open the hood and empty the Co2 extinguisher into the air intake, if it shuts down have it towed, if it keeps running = get away, and let it die.

#3. Pull to the shoulder of the road, park, open the hood and rip the air intake tube off, smother it with a piece of wood, book, or any hard surface, if it shuts down have it towed, if it keeps running = get away, and let it die.

99.9% of the time, if it runs away while driving = it is running on engine lube oil = the only way to kill it is to starve it of oxygen.
Breaking the fuel system is a waste of time, at a moment when seconds precious.