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tri power experts - what is wrong here?

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Old Sep 2, 2012 | 01:05 PM
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Default tri power experts - what is wrong here?

My '68 427/400 tri power sat in the garage for about a month. Was running as a Swiss clock before. Now it runs rough and the front carb is flooding big time. What could be the issue? Never had this problem before, so I am a bit confused!

Many thanks for any input!
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Old Sep 2, 2012 | 01:26 PM
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Stuck float. Or, some spider made his/her nest in one of the fuel bowls.

Next time, bag it up in a trash bag.
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Old Sep 2, 2012 | 02:44 PM
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I have had that happen twice on my GTO, both times one of the brass floats had a pinhole leak and no longer floated thereby causing the needle to stay open.
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Old Sep 2, 2012 | 02:51 PM
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Thanks for hints, I will take a closer look.
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Old Sep 2, 2012 | 03:29 PM
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I just had the same problem with my 427/435 car. The needle valve O ring was flat and not sealing. I am in the process of changing them now.
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Old Sep 8, 2012 | 05:39 AM
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Ok, so all non invasive methods do not help and the front carb is still flooding every time I start the car up.

Am I right to assume that I need to unscrew 4 bolts (marked red) and fuel line to be able to remove the fuel bowl? What's next, any tips?

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Old Sep 8, 2012 | 05:58 AM
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Get yourself a Holley Carb manuel . Holley carbs are very basic .
Get a manuel !

Bill
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Old Sep 8, 2012 | 09:46 AM
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Originally Posted by 63split63
Get yourself a Holley Carb manuel . Holley carbs are very basic .
Get a manuel !

Bill
Sure, but it would take me at least 3 weeks to get it shipped from US. I need a quicker solution...
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Old Sep 8, 2012 | 10:01 AM
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My car had the same symptom as yours and I changed out all of the needle seat O rings and it is not flooding anymore. I had so much gas pouring into the carbs I had to change the oil. Runs good now.
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Old Sep 8, 2012 | 10:21 AM
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Originally Posted by Linas
Sure, but it would take me at least 3 weeks to get it shipped from US. I need a quicker solution...
Get your carb # and see if you can find it listed here:
http://www.holley.com/TechService/Instructions.asp
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Old Sep 8, 2012 | 01:25 PM
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Originally Posted by petes74ttop
Get your carb # and see if you can find it listed here:
http://www.holley.com/TechService/Instructions.asp
Thanks! Was trying to find it by what I think was the part number, but no results. I might have used the wrong number perhaps...
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Old Sep 8, 2012 | 03:38 PM
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Originally Posted by 63split63
Get yourself a Holley Carb manuel . Holley carbs are very basic .
Get a manuel !

Bill
Everybody here is calling for "manuel", he must be a top notch car guy!
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Old Sep 8, 2012 | 04:06 PM
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So, did you ever check the needle & seats?
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Old Sep 9, 2012 | 01:16 AM
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Originally Posted by TheSkunkWorks
So, did you ever check the needle & seats?
No, I did not. I understand, that for some it might seem like guiding a blindman over internet, but I never had any carb-related issues in the past, so no chance for practice

Anyhow, as I understand, to check the needle and clear any debris, I need to unscrew the flat bolt on top of the carb, and then I will be able to pull the needle out?
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Old Sep 9, 2012 | 01:30 AM
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Yes loosen the screw on top and count the number of threads that are showing so when you put it back in it will be close. When I took mine out the O ring was hard and flat and was not sealing sending alot of the fuel into the carb. Check out this web site on how to take it out. Hope this helps

http://www.vintagemusclecarparts.com...eandseat2.html
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