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

fuel pressure

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Old Apr 27, 2012 | 11:43 AM
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Does anyone know the stock fuel pressure PSI for a 93 LT1
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Old Apr 27, 2012 | 08:44 PM
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38 PSI with vacuum line on fuel pressure regulator. 42 PSI with it off. That is what mine is.
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Old Apr 28, 2012 | 12:43 AM
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Thanks rubie
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Old Apr 28, 2012 | 06:53 PM
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Originally Posted by 93Rubie
38 PSI with vacuum line on fuel pressure regulator. 42 PSI with it off. That is what mine is.
Just an addition, according to the FSM, it can be as low as 31PSI with the vacuum line on an still be within spec.

Ignition On, Engine Off: 41.0 to 47.0 PSI
Engine On, Regulator Vacuum Applied @ Normal Idle: 3 - 10 PSI less than Ignition On, Engine Off.
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