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#1
05-30-2007, 11:01 AM
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W116 w/jumpy fuel gauge
The fuel gauge in my '73 450sel has a bad habit of giving randomly inaccurate readings whenever I get close to 1/4 tank, I'm thinking flakey grounds but where are the usual places to check?
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#2
05-30-2007, 11:53 AM
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you will need to pull the sending unit and clean out the rust flakes that are inside the unit. There is a small hole at the top of the unit that a straw from a brake parts cleaner can will fit.
Also- if you dont have a new cork gasket you may want to get one before trying to pull the unit. The old one will stick. Blue
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#3
05-30-2007, 01:25 PM
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I saw a visual on cleaning out the sending unit, might be in the DIY
section. take the nut off the bottom while cleaning it out and you will be surprised with the amount of gunk that comes out. be careful of the wires inside. Charlie
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there were three HP ratings on the OM616... 1) Not much power 2) Even less power 3) Not nearly enough power!! 240D w/auto Anyone that thinks a 240D is slow drives too fast. 80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works
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#4
05-30-2007, 09:32 PM
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There is certainly a lot of gunk (algae) that fouls the diesel senders, but I was unaware that the gassers sometimes had problems. Be careful with those wires inside.
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80 300SD (129k mi) 82 240D stick (193k mi)77 240D auto - stick to be (153k mi) 85 380SL (145k mi) 89 BMW 535i 82 Diesel Rabbit Pickup (374k mi) 91 Jetta IDI Diesel (155k mi) 81 VW Rabbit Convertible Diesel 70 Triumph Spitfire Mk III (63kmi)66 Triumph TR4a IRS (90k mi)67 Ford F-100 (??)
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#5
05-31-2007, 06:44 AM
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it also could be a bad dash ground....but if that other electrically operated guages would be jumpy too, which would not include the oil pressure and i am not sure about the water temp.
tom w
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.  [SIGPIC]..I also have a 427 Cobra replica with an aluminum chassis.
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