when i turn the key from off to run: the pressure goes up to 60 then after a few seconds it drops back to 14. when i start the vehicle: it goes to 52 and stays there. when i shut off the vehicle it drops to 14 immediately and stays there. Does anyone know if this is normal? If not, what should the readings be?
Not normal. You have either leaking injectors or a bad fuel pump. (letting the gas drain back to the tank.)
i think its a leaky fuel pressure regulator like the guy found on this
4.3. I have a appointment to take it into the garage on thursday. The mechanic says it takes 3 hours to take all that stuff apart. the plenum etc. thanks for your help dahpater.
dahpater.http://www.blazerforum.com/m_7118/mpage_1/key_/tm.htm Then why did you ask!!!
i was hoping for some actual numbers. not just a "its not normal" answer.
lol. Well you all ready have it figured out.1996 and later V6 and small block V8 engines - 60 to 66 psi. It should maintain 55 to 60 psi for ten to fifteen minutes with the key off.
thank you that nails it
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