Ok guys please school me !!!!!!!!

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03-22-2012, 09:09 PM

jrplz

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Ok guys please school me !!!!!!!!

I have a 2003 tahoe 5.3 not flex. Please give me the correct fuel pressure for this truck everyone has different opinions and I just cant get to the bottom of this !

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03-22-2012, 09:33 PM

KLUG'S SS

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With the vacuum line unplugged from the regulator on the fuel rail at idle on a gauge you should be seeing right at around 58 psi (4 bar).

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03-22-2012, 09:35 PM

1Bear

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2003 w/Returnless Fuel System
Key On, Engine Off (55-62 psi)
62psi with vacuum hose disconnected
Engine running or by applying 12-14 inches of vacuum to the fuel pressure regulator with a hand-held vacuum pump, fuel pressure should drop 3-10 psi.

VIN: Z - Key On, Engine Off (48-54 psi)
54psi with vacuum hose disconnected
Engine running or by applying 12-14 inches of vacuum to the fuel pressure regulator with a hand-held vacuum pump, fuel pressure should drop 3-10 psi.