C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Fuel pressure adjustment?

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Old Aug 8, 2018 | 03:22 PM
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Default Fuel pressure adjustment?

I’m installing adjustable FPR in my 89. Is the 43.5 psi without vacuum hose connected?
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Old Aug 8, 2018 | 05:29 PM
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Originally Posted by mlm0
I’m installing adjustable FPR in my 89. Is the 43.5 psi without vacuum hose connected?
correct, remove the vacuum line and cap it so there is no leak. With engine off and fuel pump running, pressure should be 43.5

what afpr do you have?
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Old Aug 8, 2018 | 05:41 PM
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I bought it of this forum. I will check when when u get home
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Old Aug 13, 2018 | 11:56 AM
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What I bought is just a new adjustable housing that bolts onto the old regulator housing, but is adjustable. It also came with a round disk that lays on top of the old diaphragm and the new adjustment screw puts pressure on the diaphragm to lower or raise it. There is no markings on it
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