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Low fuel pressure

Tiny
MIKE20670
  • MEMBER
  • 2001 MERCEDES BENZ 270ML
  • 2.7L
  • 5 CYL
  • 2WD
  • AUTOMATIC
  • 125,000 MILES
It will not start.
Spray a bit of easy start in air intake it will start.
AA called no fault on diagnosic. Fuel pressure 100psi.
Any suggestions please?
Sunday, January 26th, 2020 AT 10:04 AM

3 Replies

Tiny
94 TRANSAM
  • MECHANIC
  • 680 POSTS
I would check for a plugged fuel filter first. You have all the symptoms.

I don't have a listing for a 270ML. Instructions for a ML370 below. If these don't work let me know.

Rich
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Sunday, January 26th, 2020 AT 6:27 PM
Tiny
MIKE20670
  • MEMBER
  • 2 POSTS
I've replaced fuel filter.
But still will not start except with easy start.
I did run fuel low on gauge. Could this have caused a blockage somewhere?
Fuel pump is on the engine near the front.
Many thanks.
Mike
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Monday, January 27th, 2020 AT 12:41 AM
Tiny
94 TRANSAM
  • MECHANIC
  • 680 POSTS
Your fuel pressure should be 54 to 61 lbs. If it is 100 lbs then your fuel pressure regulator has failed. There is a fuel shut off safety feature built in so the car will not start.

As I said, I have no listing for your car. The closes I get is the 370 and there is a TSB (technical service bulletin) out for a fuel pressure issue with an updated larger fuel filter which requires installing larger fuel lines. I don't know if this applies to you car but it is the same motor. I would suggest calling a dealership and asking and we can go from there.

Rich
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Monday, January 27th, 2020 AT 9:09 AM

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