M271.860 fast drop of fuel pressure after shutting down the engine.
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M271.860 fast drop of fuel pressure after shutting down the engine.
Hello,
my E250 CGI requires few seconds to start even if it was shut down few seconds ago.
I tested fuel pressures with my scan tool and found that after a shut down rail pressure immediately drops from 55 bar to something like 8-10 bar. At the same time low fuel pressure goes up and reaches 6-7 bar.
Should the rail pressure drop so quickly?
Also, is it normal for low pressure fuel system to reach 6-7 bar? Even at idle it's about 6 bar, but gets lower to 4-5 bar when revving the engine.
If 6-7 bar is too high can it be related to long cranking before engine starts?
Thanks!
my E250 CGI requires few seconds to start even if it was shut down few seconds ago.
I tested fuel pressures with my scan tool and found that after a shut down rail pressure immediately drops from 55 bar to something like 8-10 bar. At the same time low fuel pressure goes up and reaches 6-7 bar.
Should the rail pressure drop so quickly?
Also, is it normal for low pressure fuel system to reach 6-7 bar? Even at idle it's about 6 bar, but gets lower to 4-5 bar when revving the engine.
If 6-7 bar is too high can it be related to long cranking before engine starts?
Thanks!
Last edited by withoutnick; Jan 29, 2020 at 04:18 PM.
