98 Bonneville what should the fuel pressure be - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 01-17-2005, 08:40 PM   #1
cvc
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Default 98 Bonneville what should the fuel pressure be

want to test both idle fuel pressure and fuel pressure with key on,anyone know what the numbers shoud be ? Als testing a 1993 Honda Civic any ideas on this one ?
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Old 01-18-2005, 12:39 AM   #2
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Key on, car not running, you should have 48-55psi on a 98 Bonneville.
Start idle Should drop 3-10 PSI.

Not sure about a 93 Civic, but a 91 Civic should be 40-50 PSI with the vacuum hose disconnected from the regulator.
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Old 01-18-2005, 12:42 AM   #3
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Haynes says 48-55 psi with engine off, and key on-that'* all it says though-that'* for the 98 bonne, not sure of the other one
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