1998 Buick Park Avenue NO FUEL

350 MONTE

MEMBER
1998 BUICK PARK AVENUE

Engine Mechanical problem
1998 Buick Park Avenue 6 cyl Two Wheel Drive Automatic 174K miles

OK I BOUGHT THE CAR THINKING ALL IT NEEDED WAS A FUEL PUMP I CHANGED THE FUEL PUMP STILL NOT WORKING I CHECKED THE RELAY AND IM GETTING 12 VOLTS I CHECKED IT I WAS TOLE TO JUMP #3 STILL DIDNT PUMP. AT THE PUMP AND ONLY GETTING 8V. THE PUMP WORKS CAUSE I JUMPED IT WITH A SPARE BATTERY AND THE CAR RAN FINE SOMEBODY SAID SOMETHING LIKE THAT THE OIL PRESSURE SWITCH WILL MAKE THE FUEL PUMP NOT WORK AS A ENGINE SAFETY FEATURE. WHAT COULD BE MAKING THE PUMP NO PUMP WHEN IT DOES WORK?

5 Replies

RASMATAZ

MECHANIC
75,992 POSTS

The computer energizes the fuel pump relay and power to the pump only last for 2secs when the relay de-energized. For initial priming of the fuel system. When the engine is cranking over oil pressure is being built up at which time the oil pressure switch will close and powers the fuel pump from there on.

Check fuel pressure and also while cranking engine over check for injector/s pulses-fuel injector/s might not be pulsing therefore no fuel delivery to the cylinders.

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Tuesday, May 20th, 2008 AT 12:22 AM

350 MONTE

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3 POSTS

OK BUT HOW CAN I CHECK FOR FUEL PRESSURE IF THE PUMP IS NOT PUMPING AT ALL IM GETTING GOOD PRESSURE BECAUSE I JUMPED THE FUEL PUMP OFF FROM THE TRUNK WITH A BATTERY JUST TO SEE IF IN DEED IT DID WORK SOMETHING IS KEEPING THE FUEL PUMP FROM PUMPING COULD IT BE THE OIL PRESSURE SWITCH?

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Tuesday, May 20th, 2008 AT 12:30 AM

RASMATAZ

MECHANIC
75,992 POSTS

OK BUT HOW CAN I CHECK FOR FUEL PRESSURE IF THE PUMP IS NOT PUMPING AT ALL IM GETTING GOOD PRESSURE BECAUSE I JUMPED THE FUEL PUMP OFF FROM THE TRUNK WITH A BATTERY JUST TO SEE IF IN DEED IT DID WORK.

It works but is it the correct fuel pressure and are the injectors pulsing-

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Tuesday, May 20th, 2008 AT 5:41 AM

350 MONTE

MEMBER
3 POSTS

Yes but only when I jump it off a battery it wont work when I plug it in the car I need it to work properly. Meaning I need it to work w/o jumping it. Could the oil pressure switch be stoping the fuel pump from working. The fuel pump it self is not working on its own at all unless I make it because something is stopping it from working.

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Tuesday, May 20th, 2008 AT 7:07 AM

RASMATAZ