The 390 was one in every of Ford’s most generally used huge-block engines, and was geared up in each passenger automobiles and trucks. All 390s used a single-motion, sealed gas pump. Because these pumps were sealed, they might not be adjusted and even repaired. Although poor fuel pressure is symptomatic of a faulty fuel pump, gas leaks are the commonest symptom of a defective Fuel Pump on a 390. Fortunately, putting in a new gasoline pump on this engine is fairly straightforward.
Ford 390 Fuel Pump Installation Instructions
1. Loosen the clamp on the tip of the unfavorable battery cable with wrench, then pull the cable off of the battery.
2. Disconnect the rubber inlet line from the underside of the gasoline pump. The inlet line matches onto a steel nipple on the pump, and is secured with a single clamp. Loosen the clamp with both a nut driver or flathead screwdriver, then pull the road off of the pump. Insert the tip of the line into a plastic bag, as a small quantity of gasoline will probably drip from the line.
3. Disconnect the metallic outlet line from the underside of the gasoline pump. The outline line options an in-line nut at its tip, which screws into the gas pump. Flip the nut in a counterclockwise course with a wrench till the tip disconnects from the pump. Insert the tip of the road right into a plastic bag, as a small quantity of gasoline will seemingly drip from the line.
4. Remove the 2 bolts situated on both aspect of the fuel pump with a socket wrench, then pull the pump off of the engine.
5. Wipe down the opening on the aspect of the engine that the Fuel Pump bolts to with a rag and engine degreaser. It’s important that any outdated gasket material be faraway from this surface in order that the new fuel pump gasket will adhere to the engine properly.
6. Apply gasket sealant to one side of a new gasoline pump gasket, then press the gasket into place on the engine.
7. Apply gasket sealant to the remaining side of the brand new gas pump gasket.
8. Press the replacement fuel pump against the gasket, then install the pump’s two retaining bolts with a socket wrench.
9. Tighten the in-line nut on the tip of the steel outlet line onto the bottom of the gas pump.
10. Press the tip of the rubber inlet line onto the metallic nipple on the underside of the fuel pump, then tighten the line’s clamp till the line is secure.
11. Reattach the unfavourable battery cable to the battery by tightening the nut on the tip of the cable with a wrench.
