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Home >> Chevrolet >> 1990 >> Cutaway P30, 5.7 K, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> Fuel System Pressure Test >> Fuel Pressure Relief
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Fuel Pressure Relief

Disconnect negative battery cable. Remove fuel filler cap. Since these TBI units contain an internal bleed-down feature, after a short time, system fuel pressure should dissipate.

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