My mechanic recently installed an in line fuel filter on my stock 1939 -- 85 hp engine between the fuel pump and the carburetor. Ever since then the car has been very hard to start. It acts to me like it is not getting fuel. If the car sits a while I noticed the filter has no fuel in it. It is filled with air. Do I need a check valve between the filter and the pump? Perhaps fuel is draining back thru the fuel pump. That does not seem normal. Perhaps the fuel pump needs a rebuild. Any suggestions will be appreciated. Prior to this it was a very easy starter. Jon Laing
In line fuel filters.
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FlatheadTed
Well-known member
Its possible on installation he picked up some crud and it found its way into the carb .bits of rubber ? ted
flatheadmurre
Well-known member
If it goes empty sitting your backvalves in the fuelpump aint working right.
Take the pump apart and check might just be something in the valves or time for a rebuild.
Take the pump apart and check might just be something in the valves or time for a rebuild.
use the metal filter instead of the plastic one, plastic can melt , the metal one wont, and always put the filter between the pump and fuel tank, that way any trash coming out of the tank will be caught before it gets into the pump and ruins the diafram material, always install the filter where it can be easily changed and as far away from any heat as possible
Use the 46 type fuel pump with the glass filter bowl. There are ceramic and paper
filters that fit in the bowl. I don't like cutting into the fuel line under the car to add
a filter where it is not visible. Leaking back is the valve in the pump. Bob Shewman
gadgiteer@aol.com makes the flex fuel hose with a Teflon liner and a check valve
built into the brass hex fitting on the pump end of the hose. If you read Fords
specs on testing the pump valves it only holds fuel for about a minute after the
engine is shut down. I have several of Bob's hoses on for a number of years and
never have a problem getting fuel after sitting for weeks. G.M.
filters that fit in the bowl. I don't like cutting into the fuel line under the car to add
a filter where it is not visible. Leaking back is the valve in the pump. Bob Shewman
gadgiteer@aol.com makes the flex fuel hose with a Teflon liner and a check valve
built into the brass hex fitting on the pump end of the hose. If you read Fords
specs on testing the pump valves it only holds fuel for about a minute after the
engine is shut down. I have several of Bob's hoses on for a number of years and
never have a problem getting fuel after sitting for weeks. G.M.
tiger.1000
Well-known member
Jon, I have two in-line fuel filters on my 32 Model B Cabriolet.The first between the tank and fuel pump and the second between the pump and carburettor.
After fitting the first, a routine inspection of the carburettor showed that it was picking up some fine,powdery, brown sediment. This prompted me to fabricate the contraption you see in the photos; the body of which is secured to an angle bracket which is attached to the front timing cover.
Fuel "drain-back" was also a common occurrence, hence the hand-priming
fuel pump. This takes a great strain off both the battery and starter motor.
After fitting the first, a routine inspection of the carburettor showed that it was picking up some fine,powdery, brown sediment. This prompted me to fabricate the contraption you see in the photos; the body of which is secured to an angle bracket which is attached to the front timing cover.
Fuel "drain-back" was also a common occurrence, hence the hand-priming
fuel pump. This takes a great strain off both the battery and starter motor.
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