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#1
05-16-2012, 12:46 PM
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1995 E300D cutting out
Would like to fly this by you experienced diesel folks.
Bought a very nice 606 diesel, 96K, which ran fine for a few weeks, then proceeded to quit running within a mile or so when I took her out. Had air in the fuel lines, and had to wait 20-30 minutes and 3-4 15 second cranks to get her started. After that no problem, and could drive all day. Took her into an indy as a few things needed to be done. Had new plastic fuel lines and seals done, new glow plug relay and glow plugs, new K40, new fuel filters. Still experienced the same problem- quitting about a mile into the first drive. No fuel leaks evident anywhere Brought her back and after further diagnoses, it was determined the wiring harness was crumbling, and that was replaced. Ran fine for a day or two, and the same problem was back. Went back to the shop where the indy was communicating with MB USA for most of the day trying to find the problem. MB determined that the electrical injector portion of the IP had shorted out and this caused this occasional stalling. They now want to pull the IP and send it out to be rebuilt- at a substantial cost. My question is- does this sound plausible- that an electrically controlled internal diaphragm in the computer controlled IP is causing this problem, or is everyone overlooking a simpler solution? Any thoughts would be appreciated. 
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#2
05-16-2012, 03:13 PM
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Quote:
btw if this a W210 body which I think it is by the description you should get the mechanic to inspect the shut off valve O ring, its the assembly that controls rack position in the pump and has an O ring on the pump to seal it. If that O ring leaks your engine will not fire. There is a member here who experienced such fault.
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2012 BMW X5 (Beef + Granite suspension model) 1995 E300D - The original humming machine (consumed by Flood 2017) 2000 E320 - The evolution (consumed by flood 2017)
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#3
05-16-2012, 05:06 PM
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Thanks for the reply.
Mechanic and Mercedes Benz both said the computer controls the IP and there is an electric pump that is partially inside the IP that sorts out the mixture. Car is 1995 W124 with the 606 non turbo diesel. Will forward your reply to mechanic.
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#4
05-16-2012, 06:35 PM
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Quote:
 The idle speed is the only thing controlled by the computer on this application and adjusts it based on transmission selection and whether the a/c is on IIRC. Can you just disconnect it and see if it still does the same thing? The mechanic should have seen the deteriorated wiring harness as soon as he got the intake manifold off to do the glow plugs. I'd be concerned with the statement about an electric pump being partially inside the IP  . If the car starts easily and runs fine and then shuts down you have a fuel delivery issue and not necessarily a fuel injection pump problem. Had the car sat up for any length of time prior to starting to try to drive it? Have you put biodiesel in it? What kind of fuel source are you using? There is a screen in the tank that can blind over if biod is put in after years of running regular diesel. You need to sell me that car before you put anymore money into it  .
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Jim
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#6
05-16-2012, 06:54 PM
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Mechanic did try to tape up wiring harness, but didn't last long.
Car doesn't sit long. and situation does not depend on idling time before driving. I've had it idling for 45 minutes and it may shut off or not within the first mile. Same with taking off cold. Never had biodiesel in it- only bought it in December and it's been constantly in and out of the shop. It's my 6th MB diesel and compared to the older units, it runs really sweet until...
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#9
05-16-2012, 07:05 PM
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lol
nope I'd suggest starting at the fuel tank and going through the fuel system to make sure there are no weak hoses that could possibly collapse and the screen in the tank is clean. Also check the return hose and lines.
__________________
Jim
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#12
05-16-2012, 07:56 PM
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your car has a mechanical pump, there is no W124 ever delivered that had an IFI control system.
as mentioned the only bit electric that does anything to engine rpm is the ELR controller at the back of the pump. There is also an A/C cutoff switch on the side. The engine will run with no electrics connected. There is no fuel pump in the tank or under the car, the only thing taking fuel from the tank is the suction pump on the side of the injection pump itself. The crank position sensor reading the flywheel teeth is relaying engine speed information to the ELR, EGR and A/C control units which have nothing to do in stopping the engine dead because there is no engine control unit.. When I bought my car (also a 95 E300D) it would not start. I removed the intake manifold and cleaned the fuel lines with compressed air. It bubbled in the tank and then fuel followed when I sucked on the line. it fired up first crank after that. I had verified that the Glow plugs were working. I also found out that the cat converter had completely plugged up causing NO EXHAUST, which was causing high crankcase pressure which shuts down the pump.
__________________
2012 BMW X5 (Beef + Granite suspension model) 1995 E300D - The original humming machine (consumed by Flood 2017) 2000 E320 - The evolution (consumed by flood 2017)
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#13
05-16-2012, 08:33 PM
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Good info all. The mechanic has an excellent rep for diesels. I'm still trying to wrap my mind around the electrical diagnosis from MB. Also, why does it cut out about the same distance of driving, and once it restarts, it's good to go for the rest of the day?
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