Mechanics

I HAVE A IT WON'T START I HAVE REPLACED RELAY TO FUEL PUMP BUT STILL NOTHING. ANY OTHER SUGGESTIONS

1995 BMW 525i • 160,000 miles

The car just doesn't start
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Hernandez7769
May 6, 2012.




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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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

Tiny
Rasmataz
May 6, 2012.
I have checked the fuel pump and it has the proper amount of pressure. Could it be the main relay or something electrical

Tiny
Hernandez7769
May 6, 2012.
Are the injectors opening and closing? If so -look for ignition spark

Tiny
Rasmataz
May 6, 2012.
Check for compression first. You need to start at basics. Then go to speark, check for spark at the plugs.

Roy

The engine is not getting any fuel

Tiny
Hernandez7769
May 6, 2012.
You said the fuel pressure is good-again are the injectors pulsing meaning being snchronized by the computer providing fuel into the cylinders

Tiny
Rasmataz
May 6, 2012.
We had pressure in the fuel pump yesterday and now it isn't registering anything.

Tiny
Hernandez7769
May 6, 2012.
Check/Test fuse no.18 15amp, fuel pump relay and fuel pump relay control circuit of the computer

Tiny
Rasmataz
May 6, 2012.

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