I own a 1989 F250 with a 7.3 deisel and I just bought a new feul pump and replaced it but it still doesnt pump the feul. I have hooked an electric feul pump to the line and it pumps. Could I have installed the pump wrong or could I have purchased a bad feul pump?

12+12=24

Check this 3 items in this order efi fuse, efi, relay, circuit open relay.all of them in the engine compartment's fuse box.

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is this a diesel? surely not. the plug in heats the oil in the oil pan to make the engine start easily in wintertime. you may have a faulty plugin, or if someones installed a deisel motor, you most likely have bad glow plugs,hmmm if gas, i suggest you check for faulty oildipsick heater or bad or weak fuel filter,fuel pump, it really makes a difference whether it's deisel or gas. please repost if this does'nt help, thank you for choosing fixya.com

did you change feul filter? some of these will install backwards and will have no flow.is there enough feul in tank? did you replace or clean sock at bottom of feul pump

sock in the feul tank may be stopped up.my just need a new feul pump. check feul pressure first when car will not crank.

start checking fuel pressure easier then changing pump re check that all is plugged in by air cleaner

i had that same problem with mine. i replaced my thermostat and that still didn't help. but then i replaced my radiator cap and after that it stopped overheating. im pretty sure thats what did it for me. i hope that helps.

this could be a number of problems,check the voltage with a volt meter,not a test light at the fuel pump connection. make sure you have 12V,if so unhook the fuel supply line,turn key to ON not START, and make sure the pump will continue to flow,( obviously cqatch the fuel with a pail,or put a hose on it to pump it into a pail,don't let it leak all over the place.)if the pump continues to flow with out shutting off,your pump,filter,and electrical for your pump is ok.it could be a restriction in the return line,or the regulator may not be functioning.un hook the return line as close to engine as possible,install hose on it and route to a pail to catch fuel,with supply line hooked back up,start van and see if it works,if it keepd shutting off,you've now eliminated return line problems.check the regulator.

check relay first if that is ok or a new one makes no differance then ill say its the pump

you might be looking at an air suspension pump. it is not designed to work for long periods of time.