Ran out of gas, 4 gallons back in, won't start! - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 07-01-2002, 02:19 PM
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Ran out of gas, 4 gallons back in, won\'t start!

I ran out of gas yesterday so I put four gallons in. Jeep turns over fine (YJ), coughs sometimes, but won't start. It's stuck on the side of the road so please help!
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post #2 of (permalink) Old 07-01-2002, 02:34 PM
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Re: Ran out of gas, 4 gallons back in, won\'t start!

Please fill out your profile.

If it's carb'd, your bowl is empty. Either fill it through the vent or pour a little gas down the intake to run the engine long enough for the pump to start pumping again.

If it's EFI, does the fuel pump cycle? Is there fuel in the fuel rail?
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post #3 of (permalink) Old 07-01-2002, 02:42 PM
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Re: Ran out of gas, 4 gallons back in, won\'t start!

If it is FI, there should be a little nipple (kind of like a bicycle pump thingie) on the fuel rail, you can hook a fuel pressere guage up to that to check the pressure in the rail. Not sure if it apples to your jeep, but most FI vehicles if you turn to ignition to run (w/out starting it) you can hear the fuel pump cycle up. Fuel pump is in the tank though so you may have trouble hearing it. not much, but i hope it helps.
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post #4 of (permalink) Old 07-01-2002, 02:45 PM
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Re: Ran out of gas, 4 gallons back in, won\'t start!

If all else fails, you may have also sucked up some rust and crap from the bottom of your tank. Check/change your fuel filter.
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post #5 of (permalink) Old 07-01-2002, 03:54 PM
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Re: Ran out of gas, 4 gallons back in, won\'t start!

Could the fuel filter be THAT dirty? It is only about 2 years old, but it seems like that might be it, since everything else worked fine before I dried out the ol' gas tank.

Thanks all. You all said what I was thinkin'. I just didn't know how to check for fuel getting to the fuel rail. The gas pump is only 2 years old so that should be ok. I will check to hear if I can hear it.
post #6 of (permalink) Old 07-01-2002, 04:08 PM
 
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Re: Ran out of gas, 4 gallons back in, won\'t start!

it wouldnt be a bad idea to change the filter after running out of gas in any vehicle. another thing you may want to try is to purge the air from the fuel rail. have someone turn the ignition on while you have the test port on the fuel rail open, that will allow the pump to pressurize the fuel system with fuel, and not get a 'bubble' in front of the fuel. once you finally get a fair amount of fuel coming from the port, its safe to assume you have a pressurized rail. also, do you live in an area that uses blended fuels during the winter?, you may have plugged the filter with loose varnish. just an idea
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post #7 of (permalink) Old 07-01-2002, 04:10 PM
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Re: Ran out of gas, 4 gallons back in, won\'t start!

You bet it could be that dirty. I use clear filters so I can watch it. Some gas stations sell questionable fuel. But like I said. If all else fails, check it out. Besides 2 years is a long time for one filter.
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post #8 of (permalink) Old 07-01-2002, 04:17 PM
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Re: Ran out of gas, 4 gallons back in, won\'t start!

Your filter is probably on the rear dirvers side frame rail so it may be hard to do a clear filter, but a new one shouldn't be more than $10-$15 and take about ten minutes to change (need to make sure you release the pressure on that fuel rail fitting first though. good luck :-)
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post #9 of (permalink) Old 07-01-2002, 04:33 PM
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Re: Ran out of gas, 4 gallons back in, won\'t start!

When I had that problem when i first installed fuel injection, the fuel pump wasn't pumping it all the way up. I temporarily installed another electric pump by the intake to just get the gas up there. Once i did that, i removed the 2nd pump and it worked great.
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post #10 of (permalink) Old 07-01-2002, 05:01 PM
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Re: Ran out of gas, 4 gallons back in, won\'t start!

Humm... It coughs...

Have you run the diagnoistics codes using the key switch?

From your description I think:
1. Sometimes you have fuel.
2. Sometimes you have spark.
3. Sometimes you have 'em both together.
4. But you need them ALL the time sycnronized.
5. You don't have that...


Pull the fuel line to the schrader valve and turn the igniton to run (prepare for lots of gas to spurt). If the gas is spurting... chances are that the pump's running. Do you hear it turn on for 2 seconds and shut off when you turn the ignition key? The problem could be a collapsed filter sock in the tank on the pick up or a bad filter, but I'd have my doubts if the pump's running.

Try:

1. Turn the ignition to RUN.
2. Put a ratchet and socket on the crankshaft pulley.
3. Pull one plug.
4. Ground the body of the plug.
5. Place the plug where you can see it while doing the next step
6. Rotate the engine CW.
7. Listen for the injectors to click - watch the plug for a spark as you rotate the engine.
8 If there is none... check the CPS sensor, it's wriing harness and connectors..

Then if the Spark and injectors are firing then the problem is fuel delivery and pressure.
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