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Old 11-12-2002, 11:46 AM
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Join Date: Nov 2000
Location: Philippines
Posts: 15
engine runs about 5 secs after ignition off

I have a 1985 EURO 300D with 603 Engine (Non-Turbo).

My problem is that the engine runs for a few seconds after I turn off the ignition key. I suspect it to be a vaccum leak somewhere.

Is there a way to isolate the problem by runing the engine and pulling the hoses that goes to the injection pump, tun-off the ignition key and "blowing" or "suctoin" the TWO HOSES that lead to the pump?

There are THREE HOSES that go to the directio of the pump and through the firewall to the inder dash.

1) Black - seems like a breater (from the pump area to open air)
2) Grey - from vacuum pump in front of engine to inner dash
- Y connector: Main to Vacuum pump; Left > Inner Dash and Right to side of pump (green plastic)

3) Brown - to TOP of inj. pump from inner dash

Could there be a busted part in the pump too?

Would appreciate and tips.


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engine runs about 5 secs after ignition off-vacuum.jpg  
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Old 11-12-2002, 11:55 AM
it leaks, its german
Join Date: Mar 2002
Location: raleigh nc
Posts: 1,111
check the shut off valve on top of the pump for a leak internally. Little round guy with a single vac line to it behind the rail. If you change it, test it first, then start it, if you miss the pin it goes wide open and shutting it down can be fun. not to mention a bit hard on its innards.

Project Smoker, '87 603 powered wagon
Hauler, 96 CTD can you say torque?
Toy 73 Cougar xr7 convertible
Acme Automotive Inc.
Raleigh NC
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Old 11-12-2002, 05:01 PM
Registered User
Join Date: May 2002
Posts: 40
Nin hao !! Huan Ying Huan Ying.. Nin zai Taiwan gong-zuo le ma ?

make sure you study the emergency shut-off procedures for the engine after trying the steps the other poster gave you.. you may need to kill the engine manually from under the hood ... i think there is a special way to do this " wo wang le"
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