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Mercedes diesel


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seriousfreedom
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Mar 7, 2012, 4:20 AM

Post #1 of 9 (1207 views)
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Mercedes diesel Sign In

i have been working on a Mercedes diesel for about a year now when i started it wouldn't start and run. replaced injection pump with an identical pump all numbers matching off of an identical motor.got it to run but it what i call surges rpms fluctuate high to low and blows black smoke. my question is am i missing an adjustment somewhere.could it be the Governor, or the pump its self

1980 mercedes don't recall the model number off had but can get and post if necessary
injection pump is a pes 5 mw 55/320 rs20( mw)

my background is in diesel engines but they are in big trucks like 500-800 horsepower and never really had to deal with the injection pumps on the big cam cummins ( which use injection pumps) that i have built

any help would be absolutely appreciated

if any more informations is need i will get and reply with


Tom Greenleaf
Ultimate Carjunky / Moderator


Mar 7, 2012, 6:33 AM

Post #2 of 9 (1175 views)
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Re: Mercedes diesel [In reply to] Sign In

Quote ">>1980 Mercedes don't recall the model number off had but can get and post if necessary<<"

Why post a question if you don't know what this is? I wont have a clue on these cars but you need to know and post what it is and if a Euro or American spec vehicle (some folks imported these themselves as I recall) also or don't think anyone can help much,

T
_________________________________________
Long retired now


seriousfreedom
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Mar 7, 2012, 7:31 AM

Post #3 of 9 (1169 views)
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Re: Mercedes diesel [In reply to] Sign In


In Reply To
Quote ">>1980 Mercedes don't recall the model number off had but can get and post if necessary<<"

Why post a question if you don't know what this is? I wont have a clue on these cars but you need to know and post what it is and if a Euro or American spec vehicle (some folks imported these themselves as I recall) also or don't think anyone can help much,

T

i know this is probably a stupid question but how do i know if is euro or American spec and all i have on hand is the dealer service manual on hand the car is at another location.
best i can do right now is an engine model number if that helps

and it is left hand drive if that helps any


seriousfreedom
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Mar 7, 2012, 7:33 AM

Post #4 of 9 (1168 views)
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Re: Mercedes diesel [In reply to] Sign In


In Reply To
Quote ">>1980 Mercedes don't recall the model number off had but can get and post if necessary<<"

Why post a question if you don't know what this is? I wont have a clue on these cars but you need to know and post what it is and if a Euro or American spec vehicle (some folks imported these themselves as I recall) also or don't think anyone can help much,

T

i should be able to get the model number here in a few hours if the owner of the car can remember if youll be around


seriousfreedom
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Mar 7, 2012, 7:45 AM

Post #5 of 9 (1167 views)
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Re: Mercedes diesel [In reply to] Sign In


In Reply To
Quote ">>1980 Mercedes don't recall the model number off had but can get and post if necessary<<"

Why post a question if you don't know what this is? I wont have a clue on these cars but you need to know and post what it is and if a Euro or American spec vehicle (some folks imported these themselves as I recall) also or don't think anyone can help much,

T

and the manuals i have only go by year and engine model number not by car model
sorry for any confusion


(This post was edited by seriousfreedom on Mar 7, 2012, 7:46 AM)


Tom Greenleaf
Ultimate Carjunky / Moderator


Mar 7, 2012, 9:23 AM

Post #6 of 9 (1155 views)
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I just recall several cars this old and older met enough US standards to come in new but may not have had identical engines but basically the same general stuff. It was such a price advantage back when you could go on a vacation on pricey cars, have it shipped and got a free vacation out of it.

Silly things like did it have bumpers then rated for no damage for slow bumps or different colored rear turn signals or metric speedo/odometers. Some countries require different things and some had smaller or larger engines then were profitable to market here. It should still have the basic stuff unlike some real cheapo cars you couldn't bring to the US until they were 25 model years old. Not certain but I think diesels were then exempt from emission requirements for US.

You have it running so you can still if good at diesels go by the basics. I only reluctantly worked on these as parts were difficult and nasty expensive + many were dealer only which was a pain for me so just did some silly work on them.

I'm not the right tech for diesels as great as the tech program I went thru it was just basically discussed and not very comprehensive. It's over-fueling if you see smoke/black out tailpipe so see if you can peg that to one or more cylinders with perhaps low compression which I know they must have high compression to fire,

T
_________________________________________
Long retired now


olds40316mm
New User

Apr 24, 2012, 1:26 AM

Post #7 of 9 (1007 views)
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Re: Mercedes diesel [In reply to] Sign In

well i owned a 1984 240 d and i had a similar problem Did you check to see if the
Throttle plate is opening /which is under the air cleaner/mine was stuck shut/ it quit running
rich as soon as it got some o2


nickwarner
Veteran / Moderator


Apr 24, 2012, 10:14 PM

Post #8 of 9 (1001 views)
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This thread has been dead for a month and a half. Please stick to more recent posts. I'm sure she's figured this out by now. If not, she can PM me and I'll send her some ideas.


seriousfreedom
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Apr 25, 2012, 12:21 AM

Post #9 of 9 (994 views)
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no dont have it fixed yet and im not a she........but ill take a look at the throttle plate thanks




Mercedes diesel




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