300d not starting, any advice? - Mercedes-Benz Forum

 
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post #1 of 6 (permalink) Old 02-07-2013, 09:44 AM Thread Starter
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300d not starting, any advice?

Hi, I have a 1985 300d that has sat for six years. Before we let it sit the car had been serviced, all hoses replaced and it was running fine. Then one day it just lost most power under acceleration. It took a about 4 minutes to get it from 0 to 40. It felt like maybe the turbo was bad or the alda needed adjustment. After that incident we let it sit. Now six years later we are trying to start her again. So we drained the old fuel and put new in and changed the fuel filters and battery. We started the engine, drove about one block then the engine started smoking and we limped back home. Now the car won't start. The engine cranks like it wants to start. We pumped the acceleration and that didn't seem to make any difference. We checked the fuel lines up to the injector pump and its getting fuel. But we havnt checked the fuel pump or the injectors yet. The car has low miles and little corrosion. Any idea on what this might be? Any advice would be super helpful. Thankyou
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post #2 of 6 (permalink) Old 02-07-2013, 09:52 AM
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Crank 1/2 turn on the injector fuel nut and see if the fuel comes out there.
Clogged tank strainer comes to mind.
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post #3 of 6 (permalink) Old 02-08-2013, 07:07 AM
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What colour is smoke, and did you change oil before you started it. Did you prepare engine to sit that long.
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post #4 of 6 (permalink) Old 02-08-2013, 10:33 AM Thread Starter
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Oil wasnt changed before starting, just fuel. The car wasn't prepared to sit and the smoke was black.
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post #5 of 6 (permalink) Old 02-08-2013, 10:07 PM
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Diesels don't need any preparation for storage unless you live in climate where algae are the problem.
The only winter preparation farmers do to their tractor is putting coffee can on the vertical exhaust and close the door.
I was restarting motorhome with CAT engine that sat under oak tree for about 7 years. To my surprise it run on original fuel with no hesitation, but I have never seen algae in diesel in California and motorhome had full tank, so condensation could not take a place even in winter.
Than in this case you are saying the engine was dying and that is why it was stored for 6 years. Now you don't know why the engine was dying 6 years ago and having old fuel only deepens the confusion.
I think you should do compression check beside checking fuel problem.
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post #6 of 6 (permalink) Old 02-10-2013, 07:17 PM
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Originally Posted by sneakerswell View Post
Oil wasnt changed before starting, just fuel. The car wasn't prepared to sit and the smoke was black.
If you have black smoke then you have to take fuel injectors for check. They have to spray fine mist, if they are dripping then they are not good and that is probably problem. if they are OK then you have to check high pressure pump. And put new oil after 6 years that oil lost viscosity. If you leave engine to sit for 6 years before you start it there some steps you have to do it. First, spray WD-40 in cylinders and leave it to sit there for 24h. Then spray WD-40 again and turn engine by hand slowly. If you feel to much resistance stop, Piston rings are stuck for cylinder walls. In that case leave it to sit for 24h more and try again. When engine sit that long corrosion can do lots of damage on rings, they can be stuck for cylinder walls or for pistons. Diesel engine is working on high pressure and if rings are not good its not gonna work. After all that change oil and filter. Now you already started engine, so check fuel injectors and measure compression.
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