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Power fadded over a few days now its dead. Fuel Pump?
I ran my Jeep Grand Cherokee Lerado down pretty low on fuel a few days ago. While driving up a hill before i got fuel i noticed a little loss of power and it sputtered one time. filled the tank completely and the next time i drove it, it took about 2 seconds to start where it normally takes about a half a second, it sputtered and lost more power climbing hills, the next day it was having trouble accelerating unless i went really slow so it would shift before the RPM's got too high, and now it could barely climb hills without sputtering and significant power loss. The next day, today, i was stuck on an icy hill so i shifted it into 4 wheel drive, it sputtered and died, I have not been able to start it sense, i replaced the fuel filter, and checked the spark plugs, my next step, i was going to replace the fuel pump, what do you think? with 23 gallons of gas in the tank i wanted to do it without draining it, can this be done?
Re: power fadded over a few days now its dead. Fuel Pump?
It's quite possible to ruin a fuel pump by letting it run dry, especially if it already has years of use. When you first turn on the key, leave the door open and see if you can hear a high pitched whine for about three seconds. That would be the pump priming the system. If you don't hear it, then the pump isn't working. Be sure to turn the key of for about 10 seconds before you try listenng again(it has to reset). It can be hard to hear, especially over the key buzzer.
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Your fuel pump is bad. The pump is in the fuel tank, and the fuel itself acts as a coolant to keep the pump cool. When you run out of gas, there is no fuel to cool the pump and it can burn up. You need to replace the fuel pump.
You might not believe this, but check your battery. Some of these vehicles have cut-outs when the battery level goes below a preset amount.
I work on Ford brands and on them, a low battery level will even disconnect the Alternator circuit and mess with the starter. Some even act up when the battery slightly dips below 12 volts.
Your antitheft can make your starter cut out. And If you think about it, all of the measurements to make the engine run are based on feedback of voltage and amperage. This is how the engine management system adjusts. If your prime source of power is low, then all of the following electrical readings will be low. Some may be too low to work.
Your fuelpump will hold pressure in a closed system for hours. The fuel pressure regulator will command the fuelpump to stop working if the fuel pressure is at maximum. Without responses from the other components and after satisfactory pressure, the fuelpump will turn off.
you will notice that your vehicle acts like it is starving for fuel, and sometimes , the engine will even die, and then start back up, a lot of fuel pumps can be saved by people not driving their vehicles with a 1/4 or less amount of gas in the tank, because when the the tank gets very low, the fuel pump has to work harder to pump the gas, and even overheats when trying to pump the low amount of gas to the engine therefore resulting in the fuel pump going out.
1st check to see if you are getting fuel to the engine, if yes then [ok ] " if no fuel was present , then look under the hood on the drivers side , there is a black box that should be labeled power distribution, also , in front of it is another box, these box's contain fuses, and relays, 1 of the relays is a start relay, and another one is the fuel pump relay and 1 is the fuel pump fuse, check all of these to see if they are still good, if all checks out and none of these have to be replaced, then it sounds like the fuel pump is bad, open up the gas door, where you pump gas into, and have some one to turn the ignition key on, but do not start , have them to do this at the same time, you place your ear up to the gas tank entry, this is where the gas goe's into, if you hear the pump running, then pump is working, if no sound, then it sounds like the fuel pump is bad , and will have to be replaced, hope that this information ahs helped you.
Likely you did a bad thing to the tank float when working on it If so, it will need to be taken down (again) and checked. First though check that the gauge is getting power at the attachment harness (pump and power side should have a voltage pulse and good tank grounding.)
good morning to you and welcome to fixya.com. hope we can get you fixed here. just a couple of questions first? have you changed the fuel pump yet? if so where did you buy the pump from? your pump is actually building up to much resistence and is unable to overcome it in turn no power is getting to pump as needed. i have a grand cherokee with 230k so i love hearing that you have that many miles. lets keep you rolling. let me know and ill help you out.
I had the same problem, I changed the fuel filter, put a new ignition in the column, a new module in the distributor and a new crank module, it turned out to be the fuel pump itself, go figure.
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