No start after filter replacement fuel distributor - Mercedes-Benz Forum
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post #1 of 186 (permalink) Old 06-11-2018, 02:06 PM Thread Starter
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No start after filter replacement fuel distributor

Never a dull moment. Decided to have a look at the small filter on the fuel distributor as I couldn't see if the filter was dirty or not and a new one is only 3 euro I decided to replace it. I left the main inbound fuel line disconnected (with a plastic bag around it) and order de the new filter. This evening installed the new filter, 4 days later and tried to start the car, nothing.

The engines cranks, there is spark, the fuel pumps start up, there is fuel pressure, but it looks like the fuel is not distributed evenly to all injectors. I loosend 1 by 1 the full lines on the FD to the injectors and cranked the engine to let any air out. This helped a little bit and with pedal to the metal the engine started, but as soon it drops under the 2k rpm, it dies out instantly. See movie.

What can I furthermore do?

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post #2 of 186 (permalink) Old 06-11-2018, 02:46 PM
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Are you writing about the fuel pressure regulator, the goldish canister?
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post #3 of 186 (permalink) Old 06-11-2018, 02:46 PM
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I didnít know there is a filter in the FD inlet line. Is it just a metal mesh? Could it be improper in some way or clogged somehow? Perhaps try running without it, as the upstream fuel filter at the pump cluster should be effective on its own.

You say you loosened the injector lines to purge any air. Did fuel weep from all the junctions? If not, perhaps some debris entered the FD when you removed the old filter?

You say there is fuel pressure. Did you actually measure it to see if it meets spec?

I dont see any movement in the intake plate until you push the pedal. I believe it should open slightly when you crank the starter.

Sometimes there are multiple coincident faults in old cars. Something else unrelated to your filter change may have occurred by chance. It certainly presents as a fuel supply problem but I would pour a little fuel directly into the intake to confirm.
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post #4 of 186 (permalink) Old 06-11-2018, 02:58 PM Thread Starter
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@jsebastian, No about the fuel distributor, the spider.

@dugald, The new filter is good. Didn't measure the actual pressure, as I don't have the meter for it, but when I unscrew the inbound fuel line from the FD gas quits out, so I don't think it's the fuel pressure.

I just watched the below series on YT, he purges the lines from FD to injectors as well, I try that tomorrow as well as checking the intake plate.

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post #5 of 186 (permalink) Old 06-11-2018, 04:51 PM
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Curious, what happens if you put the old filter back on?
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post #6 of 186 (permalink) Old 06-12-2018, 04:50 AM
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@bauk .. what are you highlighting in the parts schematic #50?
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post #7 of 186 (permalink) Old 06-12-2018, 04:55 AM Thread Starter
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@dugald : that is the filter fitting I replaced. (A 000 074 60 86)
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post #8 of 186 (permalink) Old 06-12-2018, 08:08 AM
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I didn't know there was a strainer in that fitting.
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post #9 of 186 (permalink) Old 06-12-2018, 10:40 PM
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Were you able to get the car running?
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post #10 of 186 (permalink) Old 06-12-2018, 11:06 PM Thread Starter
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Quote:
Originally Posted by jsebastian View Post
Were you able to get the car running?
Yes when starting the engine with full throttle and keeping her above 2000 rpm, she would run. As soon as I let her drop below 2000 rpm, the engine dies out instantly.

Yesterday I purged air all the way up to the injectors 2 by 2, all injectors receive gas, but no damn start unfortunately.
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