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#1
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Is it leaking or drinking???
Recentely I was filling up 2.5 gal and going on 27 round trip (highway driving @ 60 MPH), and every time i return home it would sit slighty above where it was sitting before i fill up my tank with 2.5 gallon, so i am think i am getting around say....hmmm 13 MPG I have a lot of smoke no matter how low i adjust my ADLA so that's not the problem, so i am thinking it must be leaking somewhere i dont smell diesel but is there places when it will leak only when driving, or is my injector is OVER feeding my engine, Heck i can even see my gas needle MOVE VERY slowly going on the high way at 60 mpg, the gas needle HAUL @$$ to R at 90 mph .... Also out of all OM617 Turbodiesel i ever driven (W123 and W126) this one flys like a rocket, I can beat my dad's 300SDL (and the 300SDL engine and drivetrain is very well taken car of) Anyways suggestion????
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Current Garage 2008 Mercedes GL320 CDI 188k mi Repair/Work in progress 1994 S350 160k mi Garage Queen & prepping for repairs 2005 E320 CDI 203k mi Healthy & Daily Driver 1994 S350 357k mi Retried as parts car 1984 300TD 214k mi Blown OM617 Poss OM603 Swap?? Sold 1987 300SDL 200K+ 1994 S320 181K mi 2008 E320 Bluetec 127k mi 1999 S420 130K mi 1980 240D 360k mi 15+ Others that has come, stay and gone GONE, BUT NOT FORGOTTEN 1995 E320 SE 220k mi 1984 300SD 350k mi |
#2
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I would find out what's wrong with Dad's '87, sounds like a pig if the '84 beats it.
Lots of fuel, check timing, injectors, valve adjust, brakes dragging, alignment, air filter and intake problems, and finally injection pump if all else fails. Lots of things can cause bad mileage including a lead-foot.
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Gone to the dark side - Jeff |
#3
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Quote:
These gauges are rather notoriously inaccurate. I don't think it's even physically possible for an injector to push enough fuel through the engine, 90 mph or no, to perceive the needle moving as dramatically as you describe. The first thing we need before we even start diagnosing fuel system problems is a good baseline of your mileage. Pull up to the levelest diesel pump you can find, and carefully fill the tank right up until the fuel is ready to spill out of the filler neck. This way, you can fill consistently each time. Now drive 200 or 250 or 300 miles or however far you feel safe running it if you really do suspect a leak that rapid - maybe take a clean (as in, dust-free) yardstick and stick it down in your tank to verify that there is still fuel in there, if you get nervous - and then fill up again, at the same pump, to the same level. Divide the number of miles you went (according to the odometer or a gps) by the number of gallons it consumed, and tell us the number. |
#4
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Pop test the injectors. If you have one stuck open in can certainly cause lots of smoke and poor economy. Also verify you IP timing.
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http://superturbodiesel.com/images/sig.04.10.jpg 1995 E420 Schwarz 1995 E300 Weiss #1987 300D Sturmmachine #1991 300D Nearly Perfect #1994 E320 Cabriolet #1995 E320 Touring #1985 300D Sedan OBK #42 |
#5
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I second the test on the injectors.....if one is dumping fuel you're looking at bad things happening to the engine.....
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-diesel is not just a fuel, its a way of life- '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k) |
#6
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The 300SDL is in great condition it runs just fine it has lots of pick up enough to tuck you into the seat, anyways i am going to do a pop test soon if i have time in my hand, as far as maintance is all up to date Valve adjustment is done, all filters changed oil chaged 2 months ago trany 2 1/2 months ago no leak in the the engine bay but may perisit somewhere, Unfortunatly my odometer is broke i just look at where it was and google map my every day destination 2X and got 26 and attempt take a pic of where it was and compari...
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Current Garage 2008 Mercedes GL320 CDI 188k mi Repair/Work in progress 1994 S350 160k mi Garage Queen & prepping for repairs 2005 E320 CDI 203k mi Healthy & Daily Driver 1994 S350 357k mi Retried as parts car 1984 300TD 214k mi Blown OM617 Poss OM603 Swap?? Sold 1987 300SDL 200K+ 1994 S320 181K mi 2008 E320 Bluetec 127k mi 1999 S420 130K mi 1980 240D 360k mi 15+ Others that has come, stay and gone GONE, BUT NOT FORGOTTEN 1995 E320 SE 220k mi 1984 300SD 350k mi |
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