It seems to happen when the car warms up, it just started yesterday. I'm sure its a vacuum leak, anyone had this problem? It's a 83 240D. Thanks!

Josh

yep vac for sure

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

Could be the vacuum pump or a leak in the main vacuum line with that many things being effected by it.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

It could be the diaphram for the brake booster. There has to be lack of vacuum or a fairly large vacuum leak for the brakes to be hard to pump.

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Doug

1987 300TD x 3
2005 E320CDI

I would say it is one of two things. The pump isn't working right (rebuild) or there is a large leak in the main line. All three of your symptoms are on different vac circuits, so I would be willing to bet your pump just took a poop.

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1989 300E 144K

Disconect the vaccuum line that goes to brake booster, start engine, and put your finger over the line, does it suck it in? If not it's the vacuum pump. Also Auto Zone in my area will loan out Mighty Vac, vacuum testers.

Hope this helps.

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Gary
85 300D Ivory, 202,000
Beatus exsisto Jesu, verus et Deus verus Vir

O'reilly has the might vac for 39.00. I've found it to be a good investment for troubleshooting problems with my 190D.

Kevin
1979 240D manual
1984 190D manual

Yellowbenz hit the nail on the head. I use my mit e vac for everything from climate control to door locks to bleeding my brakes. If you don't have one yet, get one. You will be glad you did. I didn't have one until I bought the diesel Benz last year, but it is one of those tools that you wonder how you ever got along without it once you have it.

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Doug

1987 300TD x 3
2005 E320CDI

Sorry, I figured he already had a vac pump. A vac pump to a w123 is like a hammer to a carpenter. You just need one...

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1989 300E 144K

Welcome to the world of vacuum controls Don't worry, you'll get through this and will understand your car better. Do searches here, lots of good info.

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'85 300D - 206K (sold)
'81 240D - 149K (sold)
'03 Jetta TDI - (sold)
'79 300D - (sold)

Thanks for a the replies! I will buy a Miti Vac as soon as possible, the problem is definately consistant now. I cant even drive the thing! I'll check things out on that main vacuum line.

Josh