63 impala won't stay on - Impala Tech
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post #1 of 9 (permalink) Old 05-23-2010, 10:40 PM Thread Starter
 
 
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Cool 63 impala won't stay on

Sometimes the car will start but it never stays on. Just brought a new alternator and the carb is fairly new.
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post #2 of 9 (permalink) Old 05-23-2010, 10:47 PM
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Need a better description of the problem
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post #3 of 9 (permalink) Old 05-23-2010, 11:12 PM Thread Starter
 
 
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63 impala won't stay on

When I try to start the car it won't start unless I put gas in the Carb. After I put the gas in the Carb it will turn over and the engine will start for 1 or 2 second and then turn off on its own.
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post #4 of 9 (permalink) Old 05-24-2010, 05:37 AM
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First thing to check is your fuel supply. Try cranking the car with a full fuel bowl (you can pump gas into the fuel bowl by way of the vent tube). If it runs out of gas once it starts then you need to address that problem.

You could also have an erlectrical issue where you are powering the coil off the starter motor but not the ignbition circuit so that it cranks up, but dies as soon as you let go of the key. Verify your coil has power with the ignition on first.

Big Dave
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post #5 of 9 (permalink) Old 05-24-2010, 06:07 AM
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Won't stay on

Sounds like either a clogged fuel filter, clogged fuel line or a defective fuel pump.

Paul

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post #6 of 9 (permalink) Old 05-24-2010, 08:36 AM
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Quote:
Originally Posted by fsc66 View Post
Sounds like either a clogged fuel filter, clogged fuel line or a defective fuel pump.

Paul
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post #7 of 9 (permalink) Old 05-24-2010, 12:53 PM
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Sounds right to me, Demetreus. Check the cheapest and most obvious things first: replace the fuel filter (which a lot of people forget to do on regular intervals, anyway) and then if that doesn't work, check the fuel supply from the fuel pump. I'd bet that's your most likely culprit.

NOTE! If you haven't run this car in a while, or it's possible it's sucking up bad / old gas from the fuel system, have it cleaned and flushed first! You can bung up a new fuel pump / filter by getting crud into it from an old tank or old gas, even after you change those items.

Let us know how you make out, bud.

'63 Impala Sedan
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post #8 of 9 (permalink) Old 05-24-2010, 01:32 PM
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A paper filter will disolve in water. That should be a no brainer right? However all gas sold in the US now has at least 10% alcohol by volume which means you also have water in your gas. Why? Because alcohol is a desicant that will pull water vapor right out of the air and trap it in the fuel. So if you have a paper filter it will start to disintegrate and sent celulose fibers through your fuel lines to plug up your carb.

GM used both a sintered bronze (looks to made of small beads pressed into a filter shape) and a paper fuel filter at the inlet to the carb (behind the big nut at the fuel inlet). The nut is made of steel; the carb is made of mostly zinc (it is made of pot metal which is Zinc, aluminum, tin and lead alloied together)which is very soft metal almost soft enough to dent with finger nail. Reason I mention this is it is extreamly easy to cross thread the inlet fitting when you reinstall it; ripping out the threads in the carb body. A 100 micron fuel filter can be bought from many different venders made of fiberglass. A 10 micron pre-filter can protect your fuel system by placing the perforated stainless steel mesh before your fuel pump at ther tank outlet.

You may also have a hole in your rubber diaphragm that forms the working portion of the mechanical fuel pump. If so trhe gas gets into your oil pan instead of being pumped up to the carburetor, though if the hole is big enough the rest may drip out of the vent hole in the bottom of the pump (depends upon how high the fuel level rises inside he pump). Or there could be a pin hole a hole in the rubber hose portion of the fuel line back at the tank so the pump sucks air instead of gasoline out of the tank.

Big Dave
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post #9 of 9 (permalink) Old 06-05-2010, 08:38 AM
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Demetreus: Any updates on your Chevy ??

'63 Impala Sedan
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