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General Forums => The Mess Hall => Topic started by: 93yjFirstJeep on October 05, 2009, 07:41:16 PM
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So my jeep ran out of gas the other day, so i pull over, walk to the gas station, buy a can and gas, put it in the jeep, and still no start. I noticed the fuel pump isn't priming. Is this for sure the fuel pump?
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So my jeep ran out of gas the other day, so i pull over, walk to the gas station, buy a can and gas, put it in the jeep, and still no start. I noticed the fuel pump isn't priming. Is this for sure the fuel pump?
can you hear the pump?
do you have any pressure (you can carefully press the schraeder valve to check) or is anything coming out off the return?
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are you sure you got enough gas in for it to start? and you may have clogged the fuel filter with crap from running it dry... but that wouldn't prevent it from priming as it would get up to pressure.. just not at the fuel rail (i could be wrong).
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How long did you leave the pump on after it ran out of gas?
My first thought if the pump isn't running at all is to check the fuse, might have over heted the pump popping the fuse from it running w/ gas. Otherwise I would say it's the pump. (disregard all of this is you hear the pump come on at all when the key is first turned on)
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It didnt actually run out of gas, it just acted like it
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So my jeep ran out of gas the other day, so i pull over, walk to the gas station, buy a can and gas, put it in the jeep, and still no start. I noticed the fuel pump isn't priming. Is this for sure the fuel pump?
Best way to check is check the fuel pressure at the rail. First check is as simple as pressing the valve, and if fuel comes out, the pump is working. On mine, there was nothing coming out when the fuel pump died on me...
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Try pressing the accelerator while cranking. I know it's fuel injected and you shouldn't need to, but it has worked for me in the past.
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Alright :brick:
SO i dropped the tank and replaced the fuel pump, in a college dorm parking lot, without a jack, and with about 5 gallons in the tank. Real fun.
Still no start, however the fuel pump is priming now
wtf?
fuel filter maybe?
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Go through the paces;
Check that you have spark (careful not to shock yourself!)
Check that you have fuel pressure (at the rail)
I would bet it's one or the other...
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do you have any pressure (you can carefully press the schraeder valve to check) or is anything coming out off the return?
maybe check this ^
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ya, checked it and no pressure at the rail
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ya, checked it and no pressure at the rail
Have you checked the fuel filter by any chance? It may be clogged up, and if so, this could be why the pump was not priming (there was already pressure after the pump).
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Have you checked the fuel filter by any chance? It may be clogged up, and if so, this could be why the pump was not priming (there was already pressure after the pump).
x2
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Replaced the fuel filter today, and still no pressure
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So i cracked the fuel line before the filter to see if i had pressure, and i dont. The pump is priming when i turn the key, but no fuel is coming through the line. I'm getting desperate. Any help would be great :brick:
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So i cracked the fuel line before the filter to see if i had pressure, and i dont. The pump is priming when i turn the key, but no fuel is coming through the line. I'm getting desperate. Any help would be great :brick:
is there any way that the feed and return lines are reversed on top of the tank? dunno if they are the same size but just a thought. I thought you said you can can hear the pump and it is priming now - how did you determine that?
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When i turn the key, i can hear the pump priming, but it sounds to me like its struggling. Im not sure if its just the sound of the pump or if it actually is struggling. I'm going to try and drop the tank again tomorrow and go over everything again. Im completely stumped. All of the fuses and relays are good also.
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Well if the pump runs but it doesn't deliver fuel then either the hose after the pump on the pickup tune is bad or the pump is junk so if you are sure the pump runs and the external fuel delivery line and Hose is good then the pump is junk
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So i cracked the fuel line before the filter to see if i had pressure, and i dont. The pump is priming when i turn the key, but no fuel is coming through the line. I'm getting desperate. Any help would be great :brick:
Are you sure it's priming? I might take the pump out and jump the terminals and see if it actually pumps.
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take the return out at the injector rail and see if there is any fuel coming out thru there. If it's not then like these guys before me said it could be the pump and also either the sock is clogged (highly unlikely to stop everything though) or it might be that some fuel hose or line is bent and blocking the fuel. If there's nothing coming out of the return i would take the tank out and jump the pump like it is (in the tank) to see if there's anything coming out - if there isn't go from there, if there is then something with your fuel lines is wrong so fix that.
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Alright guys, tomorrow I'm going to drop the tank after i check the return line to see if i just got the hoses switched.
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Sharpxmen was right, got the fuel lines switched. thats what you get for working in the dark in the parking lot of a college dorm :asshat:
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Sharpxmen was right, got the fuel lines switched. thats what you get for working in the dark in the parking lot of a college dorm :asshat:
it kinda made sense based on all the symptoms - glad you got it working again.
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I dont know what to tell you, but I would liik at the lines inside the tank to make sure none of them are ruptured; it's been a while since I dropped my tank, and I dont exaclty remember how it was assembled, but make sure the fuel pickup is where it should be and that there are no leaks in the line prior and after the pump...