'85 300D Rough Start, Idle

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'85 300D Rough Start, Idle

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Mercedes Forums >> Mercedes Benz Models >> Diesel Discussions >> '85 300D Rough Start, Idle

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'85 300D Rough Start, Idle - 12/23/2006 8:28:18 PM

Benz Guy

Posts: 34
Joined: 1/31/2005
Status: offline

Hello guys. Ok here's the scoop. When I start the car it lopes real bad like it does not want to continue to run. It feels like it just wants to stop running. Once the car warms up a bit it evens out a little bit. Then once warm it runs well at speed but has a bad shake at idle. The fuel filters have been replaced as well as the glow plugs, air filter, yada, yada, yada. Does anyone have any ideas? I am leaning toward the fuel injectors, anyone have any suggestions.

Thanks, Dave

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85 300D 67K Miles

Post #: 1

RE: '85 300D Rough Start, Idle - 12/23/2006 11:43:58 PM

Charles Munn

Posts: 244
Joined: 8/19/2006
Status: offline

quote:

ORIGINAL: Benz Guy

Hello guys. Ok here's the scoop. When I start the car it lopes real bad like it does not want to continue to run. It feels like it just wants to stop running. Once the car warms up a bit it evens out a little bit. Then once warm it runs well at speed but has a bad shake at idle. The fuel filters have been replaced as well as the glow plugs, air filter, yada, yada, yada. Does anyone have any ideas? I am leaning toward the fuel injectors, anyone have any suggestions.

Thanks, Dave

Could be an injector, or more. Loosen the injector fuel line at the top of each injector. Do one injector at a time, If the engine runs rougher, that's probably a good injector. If when you loosen the line the engine runs the same, then that's a bad injector. Before you do anything else, do a diesel purge. Pics are at http://www.dieselgiant.com If the diesel purge solves your problem you're home free. Otherwise you may have to replace the nozzles. Again, pics at dieselgiant, but you can buy Bosch nozzles at Napa. While you're at it, check out the pics of the ALDA service at dieselgiant...

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1982 300D T, 322,000miles
1991 Lexus LS400 212,000 miles
1986 GMC, HD, "J", 429,000 Km
All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident.
Arthur Schopenha

(in reply to Benz Guy)

Post #: 2