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Old August 27th, 2009, 07:51 AM   #1
General Motors
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99 S-10 4.3 fuel pressure

A friend of mine needs to know what fuel pressure his truck should be running at. He doesn't own a Haynes book so I thought I would ask on here. I told him to buy a guage too. I read somewhere on here that it should be @ 60 p.s.i., is this correct? Thanks!
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Old August 27th, 2009, 08:10 AM   #2
JohnL
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58 psi is where mine was at last time it was checked.
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Old August 27th, 2009, 08:11 AM   #3
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NM...looks like you got an answer.
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Old August 27th, 2009, 11:06 AM   #4
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and these fuel injection systems are very picky about pressure, no less that 58lbs. anything less, check filter for restriction, then plan on installing new pump! david
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Old August 27th, 2009, 05:45 PM   #5
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Spec is between 60 and 66 psi and as stated they are very picky about fuel pressure. If you are just a little below 60 I would try a new fuel filter first.
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Old August 28th, 2009, 09:35 PM   #6
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Thanks guys! I will forward the info. right away! Appreciate it!
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