Re: 87 R10 stalls immediately after starting
The oil pressure switch is just a backup for the relay. The ECM energizes the relay when it sees pulses from the distributor. Your pump is probably bad or the hose in the gas tank ruptured.
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Gary
1971 Chevrolet C/10
1951 GMC 100
1977 GMC C15
1955 Chevrolet 3100
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