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Gary, Chevy Technician
Category: Chevy
Satisfied Customers: 17157
Experience:  15 years GM master tech
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To continue on the problem I am having on sub got adapter to

Customer Question

to continue on the problem I am having on sub got adapter to check fuel pressure, turn key on and pressure goes to 11 psi then drops off fast after pump quits, but maintain 11 psi when running clamp off return and pressure goes up to 50 psi and truck quits too much fuel pressure, straight from pump to gauge pressure does not drop fas but real slow????
Submitted: 2 years ago.
Category: Chevy
Expert:  Gary replied 2 years ago.

I am sorry your having this problem

throttle body injection with 2 injectors ?

the fuel pressure should be 26 - 32 psi with the engine at idle

and you only have 11 ?

can you tell me everything that was done so far to correct this issue ?