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I have a BMW 525i it won't start I have replaced relay to fuel pump but still nothing. Any other suggestions

Tiny
HERNANDEZ7769
  • MEMBER
  • 1995 BMW 525I
  • 160,000 MILES
The car just doesn't start
Sunday, May 6th, 2012 AT 5:49 PM

9 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
How do you know it is the fuel pump system? Did you have it diaged or is it a guess

Roy
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Sunday, May 6th, 2012 AT 5:56 PM
Tiny
RASMATAZ
  • MECHANIC
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Have a helper get underneath and listen to the fuel pump while you turn key on-is it humming? If so -check the fuel pressure and injector pulses
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Sunday, May 6th, 2012 AT 6:00 PM
Tiny
HERNANDEZ7769
  • MEMBER
  • 4 POSTS
I have checked the fuel pump and it has the proper amount of pressure. Could it be the main relay or something electrical
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Sunday, May 6th, 2012 AT 6:09 PM
Tiny
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Are the injectors opening and closing? If so -look for ignition spark
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Sunday, May 6th, 2012 AT 6:22 PM
Tiny
ASEMASTER6371
  • MECHANIC
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Check for compression first. You need to start at basics. Then go to speark, check for spark at the plugs.

Roy
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Sunday, May 6th, 2012 AT 6:23 PM
Tiny
HERNANDEZ7769
  • MEMBER
  • 4 POSTS
The engine is not getting any fuel
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Sunday, May 6th, 2012 AT 6:24 PM
Tiny
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You said the fuel pressure is good-again are the injectors pulsing meaning being snchronized by the computer providing fuel into the cylinders
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Sunday, May 6th, 2012 AT 6:29 PM
Tiny
HERNANDEZ7769
  • MEMBER
  • 4 POSTS
We had pressure in the fuel pump yesterday and now it isn't registering anything.
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Sunday, May 6th, 2012 AT 6:44 PM
Tiny
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Check/Test fuse no.18 15amp, fuel pump relay and fuel pump relay control circuit of the computer
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+1
Sunday, May 6th, 2012 AT 6:49 PM

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