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05-13-2007, 11:40 AM
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Whats This In My Carb
Here is my problem:
I have a Chevy Silverado with a small block in it and lately the idle has been going from 1000RPMs to 3000RPMs at idle, really jumping around. So a couple a days ago I pull the carb (Holley 750 double pumper) thinking I have a vacuum leak or something. Today i go and remove the fuel bowls to find a brownish sludge in the secondary bowl, the primary bowl is super clean. What is causing this? Also on the intake manifold right under the seconday bowl there is a puddle of gasoline. I have to admit that the mounting point on the rear of the intake is stripped so my carb is only held on by 3 bolts The jets are not clogged 
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05-13-2007, 12:00 PM
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Did the carb sit dry for a while? Looks like it dried out and left behind some moisture deposits.
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05-13-2007, 01:39 PM
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From what I know there was always fuel in it
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05-13-2007, 01:48 PM
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Looks like when gas stays in a carb for to long and turns to varnish crap. Maybe your secondaries are not opening and fuel is just sitting in that bowl and going bad...
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