The Ford Barn

TomT/Williamsburg · 07-02-2010, 08:52 AM

I'm far from a guru on these things but here's what I would do. I would at the very least make sure you reduce your fuel pressure to 1 1/2 lbs, clean things off, and see what happens. You may also be getting some fuel vapor lock - is your gas cap vented? This new gas may have loosened up some junk in your gas tank - does your fuel pump bowl have any particles in it? Look dirty? If so, I would put a good, removeable gas filter just after your gas tank or perhaps on the f-wall before it enters your fuel pump. I would also clean things out as well.

Finally, because of todays new gas it has more alcohol and it may be evaporating to a certain extent - after all, you live in NV where it's pretty hot. I would put 1 oz or so of Marvel Mystery oil in the gas at every fill up just to give yourself some top side lubrication and to slow the derteriorization of your old carb's components. Don't go crazy with this stuff - I usually put a dfash in or so at fill up time. There are some automatic oiler units that are out there - I know Vic has installed one on his 39 - that can be installed down the road if you feel so inclined.

This new gas also attacks the old rubber gas lines - I would switch out all the old lines with fuel injection lines. Your old lines could be collapsing/deteriorating and sending debris to your carb.

Now, ain't old cars fun? For myself, I would not have it any other way ....

07-02-2010, 08:52 AM	#15
TomT/Williamsburg Senior Member Join Date: May 2010 Location: Williamsburg, Virginia Posts: 2,752	Re: carb boiling over I'm far from a guru on these things but here's what I would do. I would at the very least make sure you reduce your fuel pressure to 1 1/2 lbs, clean things off, and see what happens. You may also be getting some fuel vapor lock - is your gas cap vented? This new gas may have loosened up some junk in your gas tank - does your fuel pump bowl have any particles in it? Look dirty? If so, I would put a good, removeable gas filter just after your gas tank or perhaps on the f-wall before it enters your fuel pump. I would also clean things out as well. Finally, because of todays new gas it has more alcohol and it may be evaporating to a certain extent - after all, you live in NV where it's pretty hot. I would put 1 oz or so of Marvel Mystery oil in the gas at every fill up just to give yourself some top side lubrication and to slow the derteriorization of your old carb's components. Don't go crazy with this stuff - I usually put a dfash in or so at fill up time. There are some automatic oiler units that are out there - I know Vic has installed one on his 39 - that can be installed down the road if you feel so inclined. This new gas also attacks the old rubber gas lines - I would switch out all the old lines with fuel injection lines. Your old lines could be collapsing/deteriorating and sending debris to your carb. Now, ain't old cars fun? For myself, I would not have it any other way ....