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Dec 25, 2007 - Uploaded by drpottz
1995 GMC Jimmy.. brand new battery... has problems starting. ...but it just makes THIS sound and will not start. started once before and made an ... GMC Jimmy \ Chevy Blazer Fuel Tank Removal -Fuel Pump Replacement ...
I'd have to test when problem is ongoing. When you first turn on key, no crank, you should hear the pump run for a few seconds then stop. For initial prime, the computer doesn't need rpm signal. Engine cranking, the computer needs to see rpm signal or it won't ground the fuel pump relay. W/o rpm signal, no spark at the plugs and no fuel injector pulse. I know your talking about fuel, but, when problem is ongoing, check spark and fuel injector pulse, engine cranking.
Intermittent problems are a pain, have to test when problem is ongoing.
i would start by getting somebody to cycle the key on and off while you listen to hear if the fuel pump is turning on or not. (when the key is turned on the fuel pump will turn on and you should hear it start up and then turn off.) if you can hear the fuel pump come on then i would check to see if the fuel filter is plugged. if you cannot hear the fuel pump you should check your fuses. if all the fuses are good then get a rubber mallot and bang on the bottom of the gas tank. the vibrations usually will get a fuel pump to start up again and your car should start up.(if it fires up after banging on the gas tank, you will need to replace the fuel pump. the banging on the gas tank only works a couple of times. enough to get you home or to a shop to replace.)
try start with starter fluid if starts than need to check fuel filter and pump again turn key and have u or someone listen at tank for hum of pump if hum turn off and open cap to release pressure check fuel filter and or replace if needed turn on pump and check pressure at straider valve on fuel rail by fire wall drivers side if pressure vehicle should start / if no hum at pump check connections to pump and test pump new doesnt mean free from defects repair or replace as necessary
First you need to verify that the pump is getting power. Did you check the Inertia Switch? Power goes through that switch to the fuel pump. If the switch is good, and getting power,the fuel pump is most likely bad, the fuel tank must be lowered to replace the fuel pump.
Possibly. Remove and replace the fuel filter. Do you hear the fuel pump run for a few seconds when you first turn on the key without starting the engine. Have someone remove the gas cap and listen there. If the pump is running they will hear it. If it is not running check the fuse and fuel pump relay. If it is running that is no guarantee that is is actually pumping fuel. A fuel pressure test will verify that. On a 17 year old car if the pump has never been replaced it is more than likely bad.
Your fuel pump is in the gas tank. Before going there check the relay and all attending fuses as well as the fuel filter (on top of pump/sending unit) If you can't hear the pump running when you first turn the key on, likely it is electrical. If you can, then could be the filter. There are other reasons for your problem but start with the easier common stuff.
i would somehow either test the fuel pump and filter and replace the one that is not working, or replace them both. to test the filter you can try to take the filter off and blow through it. if no air comes out the other side, its clogged. for the pump, turn your key until it stops before the engine starts and listen carefully for a hum from by the gas tank. the hum is the fuel pump turnig on; if their is no hum, your fuel pump needs to be replaced.
all of the battery terminals and cables and check the wires on the
starter/selonoid, start from the battery and follow the cable out and check all
conections , clean and tighten them and if it still does it the
starter/selonoid is bad and needs replacement... also check the ignition switch and ignition module.