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1997 Chevrolet Suburban 1500 Question: computer?wiring ? or fuel pump?"

 

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davecallans, Costa Mesa, CA, May 20, 2011, 16:53
 Technician

checked with fuel pressure gauge pressure wont go above 50 p.s.i.and it wont start. once in a while pressure will go over 53 p.s.i. to 60 and then it will start.if primed it will start and keep running.I pinched of return line when i tested.cant figure out where to start

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  • Answer #1

    patrick mannion from Greg Solow's Engine Room, May 20, 2011, 18:09
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     Master

    Central port fuel injection calls for 60 to 66 psi, 56 to 62 psi to multi port fuel injected engines. A faulty fuel pressure regulator could allow fuel pressure to bleed off but by pinching the fuel return line you should get "dead head pressure" of the fuel pump which should well exceed 66 psi. Sounds like a restricted fuel filter or bad pump. Autozone have some popular workshop manuals for free on line once you register (for free) on their website http://bit.ly/autozone_repair_info. There is also a company that independent auto repair shops buy their information from that the same information inexpensively to do it yourselfers. The information is year make and model specific repair procedures, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online

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