Hello James and Ole Truckers,
Check gravity flow from fuel line by disconnecting it from the intake side of
the fuel pump. Fuel should flow in a stream the size of the fuel line. If it
doesn't, it could be one of the following is clogged: fuel line, fuel filter,
fuel tank outlet, or fuel tank air vent.
If fuel does flow well, check flow from fuel pump when starter motor turns
engine over and activates fuel pump. (This can be an explosion waiting to
happen: get good advice on how to be as safe as possible.)
If fuel pump pumps well, check carburetor.
If all these function, you should see/smell fuel in carburetor with air cleaner
removed when throttle is activated. (And, with strong spark, proper timing, and
compression, she ought to fire up.)
When you back flushed with air, was it with a bicycle tire pump? I think if you
are losing vacuum in a fuel line, you will see fuel leaking out: is that the
case?
Hope this helps,
Culver Adams
1952 Chevy 1/2 Ton PU
Minneapolis, MN
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-----Original Message-----
From: JZ <zorn...@sbcglobal.net>
To: Old_ChevroletGMCTrucks moderator <old-chevy-truck@yahoogroups.com>
Sent: Fri, Sep 6, 2013 12:02 pm
Subject: [old-chevy-truck] No gas to carb
My 235 had some problems with old gas which I believe I fixed by cleaning out
the lines with forced air, dumping the old gas and flushing the tank twice and
changing the fuel filter. I noticed that when back flushing the tank with air,
gas came back up the pickup fuel line telling me the tank was tight. I am
thinking I am leaking vacuum in the gas lines themselves. Should I replace
them? That would be a pain. Could that be the cause because I have run out of
other ideas. How would I test that?
James Zorn
zorn...@sbcglobal.net
