Long Cranking before engine starts - Mercedes-Benz Forum
 
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post #1 of 10 (permalink) Old 07-25-2019, 09:00 PM Thread Starter
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Arrow Long Cranking before engine starts

Long Cranking before engine starts
I have been dealing on this issue of long cranking before engine starts mostly every first time of engine start up, and also when engine is cold. This is very annoying as the engine cranks for nearly one minute before start up. Some times without start at first kick, I have changed fuel pump and filter, Fuel regulator, cam POS sensors still the problem is alive. Do not know what next to do, Please I need help here, Any solution or idea to this problem.
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post #2 of 10 (permalink) Old 07-26-2019, 05:57 AM
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A hint on car , model, year and engine type would be a great help.
Please fill out your profile to get help quicker. That way we would know what car you had.


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post #3 of 10 (permalink) Old 07-26-2019, 06:10 AM Thread Starter
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ML350 4Matic. W166, Model 2012
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post #4 of 10 (permalink) Old 07-26-2019, 01:27 PM
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350 petrol or 350 Deisel ??? We have both here.
Have you had the car scanned for any fault codes.


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post #5 of 10 (permalink) Old 07-26-2019, 03:04 PM Thread Starter
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350 petrol and it has been scanned without any code showing.
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post #6 of 10 (permalink) Old 07-26-2019, 04:07 PM
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Originally Posted by Firstwest Dealers View Post
350 petrol and it has been scanned without any code showing.


Run a fuel pressure test.


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post #7 of 10 (permalink) Old 07-26-2019, 04:12 PM Thread Starter
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Have done fuel pressure test and was recommended to change the fuel pump. Fuel pump has been changed with new original fuel pump
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post #8 of 10 (permalink) Old 07-26-2019, 05:06 PM
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Have You redone the fuel pressure test since the new pump install.


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post #9 of 10 (permalink) Old 07-26-2019, 05:18 PM Thread Starter
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Yes after the installation of the new fuel pump we ran fuel pressure test again.
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post #10 of 10 (permalink) Old 07-27-2019, 02:11 AM
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Iím not sure how to guide you any further Iím sorry. With no codes and good fuel pressure itís hard to comment. Have you tried scanning it at the time of the no start issue before it starts.


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