65 Malibu SS L79 Running Out of Fuel Too Early - Chevelle Tech
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post #1 of 7 (permalink) Old Jul 16th, 18, 8:20 AM Thread Starter
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Geoff
 
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65 Malibu SS L79 Running Out of Fuel Too Early

Hi - I have a 65 SS L79. I almost ran out of gas the other day ... after only 170 miles. On a 20 gallon tank should go about 240 miles +/-. I was still running (barely) but not getting enough fuel. Limped it home ... put 4 gallons from a can and 10 at the gas station. Tank should take 20 gallons ... I was expecting to put 19 1/2 total gallons (or something)

From the factory assembly manual, its not clear whether the sending unit could be turned (versus keyed so pickup is always down) or tank installed tilted ('looks fine') ... something else?

Thanks for help!

Geoff

Last edited by davewho1; Jul 16th, 18 at 2:15 PM. Reason: clarified title
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post #2 of 7 (permalink) Old Jul 16th, 18, 10:02 PM
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Re: 65 Malibu SS L79 Running Out of Fuel Too Early

Are you using a reproduction sending unit?

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post #3 of 7 (permalink) Old Jul 17th, 18, 6:21 AM
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Geoff
 
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Re: 65 Malibu SS L79 Running Out of Fuel Too Early

Not sure about the gas tank & tank neck arrangement on that model, but with some of the cars of that era it was easy to get an air lock in the tank when filling up. Nozzle at the gas station cuts out indicating the tank is full....but it is not.
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post #4 of 7 (permalink) Old Jul 17th, 18, 6:33 AM Thread Starter
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Re: 65 Malibu SS L79 Running Out of Fuel Too Early

@rich : Not sure ... very possible. I haven't had that part of the car apart. Was thinking there might be some ah ah before lying around on the floor w/ a gas tank on my face!

@Geoff : Great thought. Definitely worth a trip back to gas station to see if a few more gallons fit.
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post #5 of 7 (permalink) Old Jul 17th, 18, 10:18 AM
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Rich
 
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Re: 65 Malibu SS L79 Running Out of Fuel Too Early

Building on what Geoff #2 said, if your gas station drive has any kind of incline, try to fill up while the nose of the car is on the downhill side and you'll have better luck getting a more complete fill. BUT, today's pumps seem to have a lot more sensitive shut off trigger. This is actually a good thing, but can make getting a complete fill without potentially getting a big spill. When it is getting close to full, don't run the pump at full blast, slow it down to a trickle and pay very close attention to how full it is getting. The fill spout on the tanks are very short so you don't get much warning at all when the tank is topping off.

Oh, and also make sure the tank vent is clear and that you are using a non-vented cap.

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post #6 of 7 (permalink) Old Jul 17th, 18, 10:33 AM
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Kurt
 
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Re: 65 Malibu SS L79 Running Out of Fuel Too Early

Quote:
Originally Posted by Rich-L79 View Post
Building on what Geoff #2 said, if your gas station drive has any kind of incline, try to fill up while the nose of the car is on the downhill side and you'll have better luck getting a more complete fill. BUT, today's pumps seem to have a lot more sensitive shut off trigger. This is actually a good thing, but can make getting a complete fill without potentially getting a big spill. When it is getting close to full, don't run the pump at full blast, slow it down to a trickle and pay very close attention to how full it is getting. The fill spout on the tanks are very short so you don't get much warning at all when the tank is topping off.

Oh, and also make sure the tank vent is clear and that you are using a non-vented cap.
I learned a long time ago, that slowing the fill rate when the tank is near full, keeps the
pump from shutting off too soon ....

1966 Black/Red SS coupe .....
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post #7 of 7 (permalink) Old Jul 18th, 18, 2:19 PM Thread Starter
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Re: 65 Malibu SS L79 Running Out of Fuel Too Early

Got down to gas station ... nudged another 4 1/2 gallons into it. 'Problem' solved. :-)

@rich : yes it has the shallow non-vented cap & I took the vent out & cleared it a while ago.

Thanks VERY MUCH for input & help ... partially full tank just didn't occur to me!!
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