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What is the fuel pump pressure on a 1987 s 10 with 2.5 engine?

The fuel pressure specification for a 1987 S-10 with a 2.5L engine is 9-13 psi. This should be measured at the fuel rail with the engine running. Keep in mind that this is a general range, and slight variations may exist depending on the specific fuel system components and testing conditions. Always consult a reliable repair manual specific to your vehicle for the most accurate information.