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Canadian Poncho Homepage -> Canadian Poncho -> 58-64 Full Size Power Train Tech Forum -> Possible clogged fuel line
Post Info TOPIC: Possible clogged fuel line
Carguy327


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Possible clogged fuel line
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So I suddenly can't start the Laurentian. I pour gas into carb and it starts..then dies. So I have no fuel. I got a brand new mechanical pump ($15! cheap). On removing the old pump, I noticed that even the main line in is dry dry dry. I drove it only a couple times before parking it. It's posdible I got pretty close to the bottom of the tank and sucked something up. I'm not sure though. Do these wagons have a natural flow to the pump or does the gas need to be sucked the length of the car?  How can I diagnose it?

Thanks for any info. 

G



-- Edited by Carguy327 on Wednesday 4th of February 2015 02:12:37 AM



-- Edited by Carguy327 on Wednesday 4th of February 2015 02:14:14 AM

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dualquadpete


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Try blowing some air through the line from pump to tank should hear it in tank with cap off. If you don't hear bubbling in tank then it's EMPTY!!!! Fuel should 'free" flow thru line if rear of car raised up a bit if fuel level is that low, but with 1/4 tank of more should run to frt. easy. Make sure the F/pump push rod stays up to cam when installing the pump [ many different tricks for this]

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beaucarlo


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Maybe it is out of gas........don't trust old fuel guages

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bob lewis
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beaucarlo wrote:

Maybe it is out of gas........don't trust old fuel guages

 Exactly. Another simple test ... tap on the tank from bottom to top and back again in intervals ... you'll know by ear if it is empty.



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Prince Edward Island

'64 Parisienne CS "barn find" - last on the road in '86 ... Owner Protection Plan booklet, original paint, original near-mint aqua interior, original aqua GM floor mats, original 283, factory posi, and original rust.

HonestDave


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I would pour a couple gallons of gas in the tank so you know there's fuel. I put suction to the hose before the fuel pump, to make sure the fuel comes out. Don't use your mouth.
Once I know the fuel comes out easy, I hook it up to the fuel pump.



-- Edited by HonestDave on Wednesday 4th of February 2015 10:00:26 AM

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Carguy327


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An empty tank was my first thought too. I must have about 20 litres in there. I'm going to try to shoot a bit of compressed air first then.

Keep you all posted

G

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hawkeye5766


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If line is not pluged and the car has been sitting a long time I would put a filter between the tank and fuel pump. The fuel pump has 2 small rubber check valves in it and all it takes is 1 piece of rust to hold 1 of the check valves open causing pump to not work. If you have a vacuum gauge hook it up to output side of pump with line disconnected, get someone to crank motor and see if you get a preasure reading.

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2drpost


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check the fuel line back to the tank, be sure it hasn't rusted through. pump could be drawing air instead of fuel.



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Pontiacanada


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Water frozen in the line?



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Prince Edward Island

'64 Parisienne CS "barn find" - last on the road in '86 ... Owner Protection Plan booklet, original paint, original near-mint aqua interior, original aqua GM floor mats, original 283, factory posi, and original rust.

JC2+2


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2drpost wrote:

check the fuel line back to the tank, be sure it hasn't rusted through. pump could be drawing air instead of fuel.

 Yes and also check the hoses. Old hoses will crack and also suck air. Good luck. 



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77srx


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If you have access to a electric fuel pump maybe put a temporary rubber hose on the line going to the pump to see if it will draw fuel through the line?



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