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#1
09-02-2008, 05:27 PM
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560sl 1986 - little fuel pressure
My 560SL from 1986 was running and all of a sudden it stopped running. It does not start up anymore. Have checked the sensor valve at the fuel distributor and I think there is too little fuel pressure.
I have been reading this forum and there was a post about the fuel pressure accumulator. I am not very familiar with that thing. I can recognize it from the picture of a fuel pressure accumulator. Is the fuel pressure accumulator situated next to the 2 fuel pumps? (I have never had a car with 2 fuel pumps.) Could this fuel pressure accumulator be the problem. If so, how do I check this fuel pressure accumulator if it is working or not? Any advice will be welcome. Thank you 
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#2
09-03-2008, 11:09 AM
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The most basic check
Have someone crank the starter while you put your hand on the fuel pumps to see if they are running. If they are not, it's probably a bad fuel pump relay.
__________________
Chuck Taylor Falls Church VA '66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe
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#3
09-03-2008, 04:46 PM
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thank you, ctaylor738. I will do that tomorrow. Will let you know the results.
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#4
09-03-2008, 05:10 PM
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Does the tank make a Whoosh noise when you turn the gas cap? Could me something as simple as the tank vent or tank screen.
__________________
1985 500SL Euro w/ AMG bits 130k  1984 300SD Turbodiesel 192k  1980 240D Stick China 188k  2001 CLK55 AMG 101k  2007 S600 Biturbo 149k Overheated Project, IT'S ALIVE!!! 
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#5
10-13-2008, 02:04 PM
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Any news on this one? My 87 560SL is behaving badly and I suspect the fuel pumps. Took it on a short test drive today after I had re-checked the crank position sensor, and it will die in a turn, coming to a stop, even while driving. The pumps have always buzzed at start up, but now they sound very different. The car will sit at idle, but driving is when the stalling starts. After this short warm-up and drive this morning, I opened the fuel cap when the car was back in the garage and there was no pressure to release. Looking for feedback as always. Thanks.
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Kevin Arburn Overland Park, KS 1987 560SL
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#6
10-13-2008, 04:54 PM
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This really sounds like you have a plugged tank screen. Pumps making noise, and stumbling at anything more than idle. Easy to check with a fuel volume test, lots of posts on how to do it, and it's on the CD.
__________________
Chuck Taylor Falls Church VA '66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe
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#7
10-13-2008, 08:17 PM
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Thanks for the tip - I'll check it out.
__________________
Kevin Arburn Overland Park, KS 1987 560SL
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#8
10-28-2008, 02:11 PM
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Quote:
I still not have done what you said, but when I do I will let you know the result.
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#9
11-30-2008, 04:30 PM
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have put the car away to repair at a later time.
I am having a 560sl 1987 now that needs my attention. thanks for the help.
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