Classic Mustangs (Tech) Technical discussions about the Mustangs of yester-year.

Fuel flow problem/question

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Old Dec 10, 2008 | 06:38 PM
  #11  
cmanf's Avatar
cmanf
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I had chunks of rubber getting in my old falcon years ago from the factory rubber lines breaking down.
Something to think about could have the 40 year old lines in places still. Not assuming anything just it was a surprise to find a lil brass filter hiding behind the fuel inlet in my factory carb. The combo of those 2 problems drove me nuts for a month till i replaced all the above.
Old Dec 10, 2008 | 08:11 PM
  #12  
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JHPSTANG
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As for the old gas tank, here's what I found when I replaced mine. The fuel sending unit looked like this:

Here's the new one for comparison:
http://s448.photobucket.com/albums/q...t=PB090704.jpg
Totally worth $100 for new tank/sending unit.

+1 on fuel line and filter replacement as well.
Good Luck!

Last edited by JHPSTANG; Dec 10, 2008 at 08:12 PM. Reason: wrong pic, oops
Old Dec 10, 2008 | 09:59 PM
  #13  
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Nick.Simonds
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Omg thats nasty
Old Dec 12, 2008 | 03:17 PM
  #14  
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runway1
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Originally Posted by Nick.Simonds
Hey runway1, you havent by chance put E85 in there have you?
Nope. Not done that.
Old Dec 12, 2008 | 03:24 PM
  #15  
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runway1
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Originally Posted by jlg2002
Ruway, any chance you could do a pump pressure and volume check? ( about 15 mins work if you have the pressure gauge). This would tell you if it was supply or carb.

volume check : 1 pint in 20 secs. press 4-6 psi (both values are with the engine at idle)
Originally Posted by 1965fastback
Accelerator pump going bad?

Sonsays it happens an both cold and hot and yes, it's getting worse now after replacing the line and filter from the pump to the carb.

So, I got:
*Replace old rubber and check that God aweful sending unit in the tank
*Check fuel pressure
*Once those are good, The carb is the problem assuming I don't find other gook in the new filter.

Unless I missed something, that's what I going with.
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