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Unread 03-10-2013, 06:18 AM   #1
OleBlue73
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1973 CJ5 
 
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Ran out of gas at 1/2 tank

Since my refurb is done, I've been cruising and tweaking my jeep. Luckily yesterday as Ole Blue started stuttering, I was able to pull right into a gas station to fill up. I was "out of gas", but the gauge was sitting at half full. I filled it up and only took 7 gal, so the gauge is fairly correct. It started right back up and ran good as soon as the pump was primed back. Sounds like a fuel pickup issue. Anyone else experienced this? It's a brand new 15 gal MTS poly tank and their pickup/sending unit they sell. I seem to have the tank vented properly, but I'm going to let it happen again and remove my gas cap to see if it is air locking for some reason at 1/2 tank. I'll do that before dropping the tank. Thanks.

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Unread 03-10-2013, 06:24 AM   #2
CousinCJ
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Keep a can of gas in the back!
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Unread 03-10-2013, 09:21 AM   #3
OleBlue73
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Quote:
Originally Posted by CousinCJ
Keep a can of gas in the back!
Not a solution to the issue, but will work at the point when it happens again to get me a little further...
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Unread 03-10-2013, 10:24 AM   #4
wellmax
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I feel you pain,
i never trust my gas gauge, i alway write down the odometer reading when i fill up the old jeep
that way i know where i am with the gas issue.

Not hard for me as my old tractor does not have a gas gauge, so the tank level has to be checked from time to time.

I am old school, just happy that the old jeep still starts/runs and the radio still plays.
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Unread 03-10-2013, 06:54 PM   #5
skizriz
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When you put the sending unit in the tank, did you make sure the pickup reached the bottom of the tank?
I barely put the "sock' on the end of pickup tube, and let the bottom of the tank push it on as I drop the sending unit in.
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Unread 03-10-2013, 08:07 PM   #6
OleBlue73
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Quote:
Originally Posted by skizriz
When you put the sending unit in the tank, did you make sure the pickup reached the bottom of the tank?
I barely put the "sock' on the end of pickup tube, and let the bottom of the tank push it on as I drop the sending unit in.
Since it was the first time putting it together, I was more interested in getting the unit sealed at the top. I believe I pushed the filter on the tube as far as it would go because I didn't want it to fall off before it set in the tank. You describe the filter as an extension of the pickup tube. Is this correct? I wouldn't think the filter would hold enough suction to allow gasoline to travel through it and not come back out before making it to the tube.
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Unread 03-10-2013, 10:08 PM   #7
arg0413
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I know this is a silly question but, did you change your fuel filters?? I had this same problem due to my fuel filters clogging.. I however had an old rusty tank and not a new one link yours..
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Unread 03-11-2013, 01:54 AM   #8
BagusJeep
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If you could only cram in 7 gallons your gauge is fine, it is something else.

Most likely culprit is the pickup has a hole in it or the sock, which extends the suction level down, has fallen off.

It may also be a bent pickup tube, they are easy to bend.

I make sure mine touches bottom just before the seal lands and then press down a bit.

Other issues could be holes or splits in the Hose and the Tube.
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Unread 03-11-2013, 09:02 AM   #9
cj5huntingrig
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CJ fuel sender pickup tubes are always a little short. I had the same problem. I know this sucks but you can remove the tank, remove the sender and pull the sender back out. take the sock off and see the link below.
This is one of many possible solutions.
http://www.jeepforum.com/forum/f8/fu...oblem-1307974/

Also, if you put in an electric fuel pump (pushing pump like the Holley), it HAS to be below the usable level of fuel. I had to mount mine low on my frame rail but it still struggles to get fuel with approx. 2 to 3 gallons left in the tank.
Good luck!
Evan
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Unread 03-11-2013, 09:50 AM   #10
OleBlue73
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Quote:
Originally Posted by cj5huntingrig
CJ fuel sender pickup tubes are always a little short. I had the same problem. I know this sucks but you can remove the tank, remove the sender and pull the sender back out. take the sock off and see the link below.
This is one of many possible solutions.
http://www.jeepforum.com/forum/f8/fu...oblem-1307974/

Also, if you put in an electric fuel pump (pushing pump like the Holley), it HAS to be below the usable level of fuel. I had to mount mine low on my frame rail but it still struggles to get fuel with approx. 2 to 3 gallons left in the tank.
Good luck!
Evan
Thanks. This is just the info I was looking for.
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