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Long Cranking Problem, Hard to start..

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Long Cranking Problem, Hard to start..

 
Old 07-01-2016, 03:18 AM
  #151  
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C240
Dropping fuel pressure in fuel lines

I just checked the fuel pressure , it shows 37PSI,
and as soon as I turn off the car, pressure gauge drops to zero,
I have these problmes too :
1- I have hard start problem , it takes unusual time to start
2- My Car shuts off with half gas tank . replaced both fuel pumps, may be related to fuel pressure in tank.

Please let me know if you have any idea.
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Old 07-01-2016, 03:28 AM
  #152  
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2004 C240
I never had any problems with the fuel level......most of the time, I run the gas tank down to 1/8th. of a tank or the gas warning light comes on. Since it is not winter, the car runs perfect. BTW, the dealer did mention that the MAF needs to be replaced, I had the mechanic clean the MAF, rather than replacing it for less than $50 bucks.
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Old 07-01-2016, 03:31 AM
  #153  
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Originally Posted by mlee1951 View Post
I never had any problems with the fuel level......most of the time, I run the gas tank down to 1/8th. of a tank or the gas warning light comes on. Since it is not winter, the car runs perfect. BTW, the dealer did mention that the MAF needs to be replaced, I had the mechanic clean the MAF, rather than replacing it for less than $50 bucks.
your problem It should be fuel filter, cheapest way to start for diagnose.
my problem is really complicated.
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Old 07-01-2016, 03:39 AM
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C240
please check fuel pressure in fuel lines.
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Old 07-01-2016, 01:21 PM
  #155  
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2004 C240
one of the first thing my mechanic checked was the fuel pressure.....he didn't notice any drop during the overnight test. he chalked it up as a lazy fuel pump. someone mentioned that they had the software updated and it resolved their problem. when i brought my C240 back to the dealer, i asked them to check for updates......which i doubt they even looked.
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Old 07-30-2016, 01:39 AM
  #156  
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2004 C240
Originally Posted by Shawn K View Post
I have 2003 c240 and replaced both fuel pump and fuel sending unit and fuel filter and car runs perfect but the car stops and shuts off with half gas tank, and when I put gas in tank it starts and runs again, I have to fill up my gas tank when It is getting close to 1/2 tank.
I have long cranking problem too, it is not usual time for start when I am starting my car,
please let me know if you have any idea.
If you found a solution, drop me a note. thanks....
My 2004 C240 will be hassle free for another 4 months or so. Then I will start adding a fuel cleaner (Sea Foam) to the tank every month or so. It seems to help.
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Old 11-14-2016, 09:24 PM
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Originally Posted by Shawn K View Post
your problem It should be fuel filter, cheapest way to start for diagnose.
my problem is really complicated.

BTW, when I serviced the car when this cold start problem surfaced, the fuel filter was changed, along with new plugs, fluids, and replacing the Crank Position Sensor plus the Cam Sensor.

I am thinking it has to do something with the winter blend gas. I even tried all the top tier gas and it didn't help. Only during the cold winter months is when I have a cold start problem. During my last service about 6 months ago, I had the mechanic clean out the MAF.
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