Replacing The Fuel Pump & Sending Unit On A 1987 C4 Corvette ...
Answer: Once you have troubleshooted your Corvette’s Fuel System and determined it is time to install a new fuel pump & sending unit on your Corvette you will first need to disconnect the negative battery cable and relieve the pressure in the fuel system. To relieve the fuel system pressure on a C4 Corvette you can simply remove the gas cap and let the car sit for 15 minutes. Once the pressure is relieved drain your Corvette’s fuel tank and remove the tank filler door attaching screws and bezel. Next, lift the fuel tank filler pipe housing and disconnect the drain hose from the nipple. Before disconnecting the fuel tank filler pipe housing, clean all fuel connections and surrounding areas to avoid contaminating the fuel system. Next disconnect the fuel hoses and EVAP hose from the fuel sender assembly. Plug or pinch the fuel feed and return hoses and remove the fuel sender electrical connector. To finish removal of your C4 Corvette’s fuel pump and sending unit remove the fuel sender assembly attaching screws, assembly, and gasket. You can re-install the old gasket but first check to see if your new C4 Corvette Sending Unit came with a new gasket. If it did then discard the gasket and thoroughly clean the gasket sealing surfaces. If you just purchased a new C4 Corvette Fuel Pump you will need to purchase a gasket separately or re-install the old gasket. Finally, cuts, nicks, swelling, or distortion is common on the fuel feed, fuel return and EVAP hoses so be sure to inspect these hoses before proceeding.
Once you are ready to install your new C4 Corvette Fuel Pump & Sending Unit begin by positioning the gasket on the fuel tank with the notch facing forward in the right hand corner of the tank. Carefully fold the strainer to allow it to fit through the opening in the tank. Next, install the fuel sender assembly into the fuel tank and re-connect the fuel sender electrical connector. Then connect the EVAP hose and tighten the hose clamps. Re-connect the fuel drain hose to the nipple on the filler pipe housing and place the housing around the filler pipe. Now you can re-install the filler door bezel, add fuel, and re-connect the negative battery cable. Before driving your Corvette away, be sure to turn the ignition switch on, off, then back on and check for any possible fuel leaks. If no leaks are recognized your Corvette fuel pump replacement was a success.
This procedure is very good and will result in a successful installation. It’s not necessary to completely drain the fuel tank, but it is advisable to run the fuel level down as far as possible. I had never changed a fuel pump & sending unit on a Corvette before. The procedure took about two hours, start to cleanup and was 100% successful!
1987 Corvette Fuel Pump - Bookshelf
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