Testing the fuel pump's fuel pressure may seem impossible on the 4.3L, 5.0L, or 5.7L TBI equipped pickup or SUV since they don't come equipped with a Schrader valve. But the fuel pressure can be tested using a special adapter that either fits between the throttle body and the pressure line or fits in place of the fuel filter.
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Testing the fuel pump's fuel pressure may seem impossible on the 4.3L, 5.0L, or 5.7L TBI equipped pickup or SUV since they don't come equipped with a Schrader valve.
But the fuel pressure can be tested using a special adapter that either fits between the throttle body and the pressure line or fits in place of the fuel filter.