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

Fuel pressure regulator

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Old 02-11-2016, 02:35 PM
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gregs86
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Default Fuel pressure regulator

Does anyone know if the diaphragm kit are the same for adjustable and stock. Regulators

Thanks Greg
Old 02-11-2016, 03:50 PM
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gerardvg
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Originally Posted by gregs86
Does anyone know if the diaphragm kit are the same for adjustable and stock. Regulators

Thanks Greg
Yes it is just the regulator cover with the screw that is different, how old is the diaphragm?
They can tear with age and leak fuel into the sump via the vacuum hose, or leak through the hose onto engine and result in fire.
I recommend replacing the diaphragm as well, cheap insurance.
Old 02-11-2016, 03:54 PM
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gregs86
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Thanks for the reply. I started my car this morning and raw gas was coming out of the exhaust. Pulled the vacuum line to regulator and there was gas there so I'm in the process of removing plenum now to get to the regulator.
Old 02-11-2016, 11:53 PM
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Cliff Harris
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You will need a Torx T-10 security bit to get the FPR cover off. I guess they didn't want people messing with it...

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