car does not start

Asked by Dec 14, 2014 at 03:18 PM about the Oldsmobile Cutlass Supreme

Question type: General

91 olds cutlass wont start. has new fuel pump,good spark to the plugs,45lbs fuel pressure ,good injector pulse,good engine compression.as soon as the fuel pump shuts down fuel pressure drops to 0.it will start with carb cleaner spayed into intake.trayed pinching off fuel return hose,makes no difference.I have been a tech for 50 yrs but i am mistified

5 Answers

70,315

Sound,s like you have good fuel pressure,if this at the fuel rail?

70,315

But if loosing pressure that fast,something is not right with,the fuel system,should hold it for a good while.

70,315

Check the fuel pressure regulator,may be bad,

1 of 1 people found this helpful.

mark already changes pressure regulator no change

70,315

Are you sure the timing is correct?It take ,s timming to put the fuel and fire together,the ECM controls,the injector,s same as plug,s.

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