car does not start

Asked by berttrench 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
143,785

T_S_T answered 9 years ago

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

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143,785

T_S_T answered 9 years ago

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

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143,785

T_S_T answered 9 years ago

Check the fuel pressure regulator,may be bad,

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143,785

T_S_T answered 9 years ago

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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