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replaced fuel pump fuel filter pressure regulator gas only coming out of one on 1992 Chevrolet Suburban 2500

side of fuel injectors

WHAT IS YOUR FUEL PRESSURE?
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WHAT IS YOUR FUEL PRESSURE?
Could be wire harness problem where air filter sets on throttle body or that injector has failed. Need to check ground signal and power to that injector. Do not use a regular test light. Use a noid light or a volt meter.