Injection Pump Problems?? - Page 2 - Mercedes-Benz Forum

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post #11 of 22 (permalink) Old 06-07-2009, 09:35 PM
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Yeah man I have a 69 220D as well. I love that car, and although I definitely understand what you mean about it not being a powerhouse, it does cruise nicely around 80 or so on the freeway. Or even more if I want it to for a minute. My injection pump just went and I'm getting through the whole ordeal now. It started smoking white really bad, running rough, and eventually only pumping on two cylinders. I think those are always the signs and symptoms of one wearing out. I don't know if that helps, but I'd be interested in talking to you more about yours and what you've done with it. With the new pump and the engine in good shape I'm thinking about doing some sort of a low pressure turbo on mine although I've never done one before.
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post #12 of 22 (permalink) Old 06-08-2009, 07:12 AM Thread Starter
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80!!! I would be lucky to get 80 on a 8% grade with it floored!!! Mine is the turtle express!! Slow as all hell...

I dont know what to do about it. I am going to change the vacuum diaphragm this week and I have a couple of bottles of diesel purge on order that will be in this week, one last thing is to do a valve adjustment!! I dont know what else to do, maybe the exhaust is plugged up?? I want to cut the resonator out and put a cherry bomb in there but I also dont want it to sound like a tractor trailer..

Got any ideas??
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post #13 of 22 (permalink) Old 06-08-2009, 08:53 AM Thread Starter
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I just recently added some oil to the injector pump. Could this be my sluggishness??

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post #14 of 22 (permalink) Old 06-08-2009, 03:24 PM
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Check the pump dipstick.
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post #15 of 22 (permalink) Old 06-09-2009, 05:46 AM Thread Starter
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Dipstick? There isnt one.. Just a red cap that says "Oel", I guess thats the fill..

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post #16 of 22 (permalink) Old 06-09-2009, 08:25 AM
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It typically is on the governor housing cover on the rear. It many be a part of the oil fill cap on yours.
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post #17 of 22 (permalink) Old 06-09-2009, 11:15 AM Thread Starter
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I just filled it until it was close to the top. I havent had a chance to take it out and beat on her a little bit. I think today I am going to attempt to change the diaphragm on the front of the vacuum pump. That does not seem to be that hard of a job. Ill be back Tomorrow with a report on my progress!! Until then, here is a napa part that I am looking for that I cant find anywhere!! ATM 0005864043.

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post #18 of 22 (permalink) Old 06-10-2009, 01:36 AM
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It's never going to run right full of oil. The governor weights are now submerged in oil.

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Not part of the in-crowd since 1952. It's BRAKES not breaks. You break a bone, use brakes to stop your car. /rant

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post #19 of 22 (permalink) Old 06-13-2009, 05:52 AM Thread Starter
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OK so it spit a little oil out of it and didnt seem to change much. I yesterday ran a can of diesel purge through the system and it came out clean, almost pink. I changed the diaphram on the front of the vacuum pump and the to little valves on the front of that case. I still cant get it to go more than 45-50. I cat get it going that fast on the flats, hills forget about it. There has to be something I can do to get some more power. Im sure this little car can go a little better!!

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post #20 of 22 (permalink) Old 06-13-2009, 05:41 PM
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Ok, so to clear up the oil issue...on the pump you don't need to worry about the level whatsoever. Fill it as much as you can, and it will take care of the rest. If you notice on these pumps, there is a small curved steel tube between the pump body and the engine. This is the overflow. Just fill it up using the same oil you use in the engine. I just had mine rebuilt by a vintage MB fanatic who's been doing it professionally forever and thats what they told me at the shop.

So how did the vacuum pump effect the performance? And did you run into anything weird? I think I'll do mine if its not a huge issue.
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