Thread: 1978 2wd Blazer
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Old 10-17-2015, 12:54 PM   #23
MTCK
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Location: Fairbanks, AK
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Re: 1978 2wd Blazer

Cool blazer. I think you are just needing one relay that stays hot with the ignition on. The tbi oil pressure switches duplicate the current coming from the relay in case of a relay failure the pump keeps going. I've never run an electric pump with a carb but assume it would work the same with a return style fuel pressure regulator.
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1991 V3500 L29 454 4L80E NP205 D60/14 Bolt 4.56's
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