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Discussion Topic:
Bucking problem
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silverchief |
05-07-2014 @ 1:07 PM
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Senior
Posts: 539
Joined: Oct 2009
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Thanks Bob will take a look at it.
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supereal |
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05-06-2014 @ 4:37 PM
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Senior
Posts: 6819
Joined: Oct 2009
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It is possible the the pickup tube in the gas tank has rotted off. Usually, that means that fuel starvation is most pronounced when turning one way over the other when the fuel sloshes away from the pickup . This causes a bubble in the line which interrupts the flow,even after the turn.
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silverchief |
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05-06-2014 @ 12:41 PM
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Senior
Posts: 539
Joined: Oct 2009
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Thanks Tom - seems I recall now that the bucking shows most when I am turning - indicating low fuel level in the bowl. However, I can slowly floor it in any gear on the straight - even uphill and there is no fuel starvation. Puzzling.
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silverchief |
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05-06-2014 @ 12:41 PM
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Senior
Posts: 539
Joined: Oct 2009
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Thanks Tom - seems I recall now that the bucking shows most when I am turning - indicating low fuel level in the bowl. However, I can slowly floor it in any gear on the straight - even uphill and there is no fuel starvation. Puzzling.
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TomO |
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05-06-2014 @ 6:34 AM
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Senior
Posts: 7385
Joined: Oct 2009
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Your fuel level may be on the low side as that is when the change happened.
Tom
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silverchief |
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05-05-2014 @ 1:46 PM
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Senior
Posts: 539
Joined: Oct 2009
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I was able to tighten the clamp where the flex fuel line connects to the line from the tank, the clamps on both sides of the pressure regulator, and where the flex line connects to the carb - for noticeable improvement. Also, slightly increased the idle at normal temp, which was a little slow. So....we will see where we go from here.
Thanks again.
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supereal |
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05-05-2014 @ 5:44 AM
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Senior
Posts: 6819
Joined: Oct 2009
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I had forgotten you use an electric pump, but that doesn't mean it is functioning properly. Any obstruction in the fuel line may be preventing the pump from sensing need. I have seen more than one that balks. I use them to prime the carb, but not as a substitute for the original. The Airtex pump from C&G is a good unit, but even those don't always match demand until the need is too low for even delivery.
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supereal |
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05-05-2014 @ 5:32 AM
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Senior
Posts: 6819
Joined: Oct 2009
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I had forgotten you use an electric pump, but that doesn't mean it is functioning properly. Any obstruction in the fuel line may be preventing the pump from sensing need. I have seen more than one that balks. I use them to prime the carb, but not as a substitute for the original. The Airtex pump from C&G is a good unit, but even those don't always match demand until the need is too low for even delivery.
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silverchief |
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05-04-2014 @ 5:58 PM
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Senior
Posts: 539
Joined: Oct 2009
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Thanks guys - I have an electric pump and a steel needle - but your suggestions are good and I will look at all of it and let you know.
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ford38v8 |
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05-04-2014 @ 5:57 PM
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Senior
Posts: 2881
Joined: Oct 2009
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I agree with my friend Supereal, Your carburetor must maintain an exact fuel level in the bowl to function as it was designed to do. For whatever reason, that level is not being maintained, running just shy of that level. Supereal's suggestion of sucking air at the flex hose fitting or at the pump's glass bowl gasket would also be my first guess. If not driven regularly, that cork gasket mummifies and leaks. Soaking that gasket in hot motor oil will freshen it up. Just don't let your better half catch you using her sauté pan for that.
Alan
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