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2003 Buick Century starts with starting fluid, but not on its own

Tiny
JOHN GRICE
  • MEMBER
  • 2003 BUICK CENTURY
  • 103,000 MILES
The car will start with the aid of starting fluid. After it starts it will run until you urn it off. Then it will not start again until you spray it with starting fluid again.
Saturday, February 11th, 2012 AT 8:27 PM

6 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,779 POSTS
Check fuel pump pressure. It sounds like it has a weak or lazy pump.
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Saturday, February 11th, 2012 AT 8:41 PM
Tiny
JOHN GRICE
  • MEMBER
  • 4 POSTS
Fuel pressure is 60# at startup and about 55# when it is running. The relay and regulator have been changed. Could it be the crank sensor or the cam sensor? What does the computer use on start up?
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Sunday, February 12th, 2012 AT 12:39 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,779 POSTS
Is the fuel pressure that high with the engine off (when it won't start)?
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Sunday, February 12th, 2012 AT 3:05 AM
Tiny
JOHN GRICE
  • MEMBER
  • 4 POSTS
YES. SOMETIMES AS MUCH AS 70#.
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Sunday, February 12th, 2012 AT 9:30 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,779 POSTS
If there is spark and fuel, it should run then unless the injectors are not firing.
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Sunday, February 12th, 2012 AT 9:43 PM
Tiny
JOHN GRICE
  • MEMBER
  • 4 POSTS
WE BELIEVE THAT IS THE PROBLEM. THE INJECTORS ARE NOT FIRING, BUT ONLY ON START UP. ONCE THE CAR FIRES ON STARTING FLUID, IT RUNS LIKE NEW UNTIL YOU SHUT IT OFF.
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+1
Wednesday, February 15th, 2012 AT 2:22 PM

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