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Attach a fuel pressure test gauge to the test port, then cycle the ignition key on and off (without starting the engine) leaving the key in the on position a few seconds each time until the pump has reached its highest reading while the pump is running. This would be 60 to 66 psi for the 4.3 engine or 41 to 47 psi for the 2.2 engine.

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Q: How do you check fuel pump press on 1998 s10 picup?
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