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Old 05-15-2005, 10:33 AM
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What is this crap in my carb?

My sons truck was giving him fits with the carb running over so we decided to check the carb and fuel pump. Its a very strong 400 Chevy with a Qjet carb. There is a Fram inline gas filter about 2" before the carb inlet. When we got the carb off and the top removed, I could not believe the crap that was sitting in the float bowl, and later on what was in the filter.

I rebuilt the carb about a year ago and installed the Fram filter too.

This first picture is what I flushed out of the float bowl of the carb and managed to capture in my hand when I poured out the mess. Remember, this is the stuff that made it THROUGH the Fram filter! Its not metal, checked with a magnet. Its almost like small slivers of plastic? Looks like metal shaving off a brake lathe, but not metal.



These next 2 pics are of the Fram filter. All this unknown stuff is what was on the INLET side of the filter. Really curious what it is, where it came from and why it made it through the filter and caused us such grief!





Mark

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Old 05-15-2005, 10:53 AM
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Looks like the remains of the fuel line sock that was in the tank. Try a Purolator filter.


Larry
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Old 05-15-2005, 10:57 AM
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I would clean the tank and lines and add an inline filter before that filter. It is pretty evident the filter did not do it's job either it started plugging and deformed and let trash pass or it never fit right in the first place. On the other side it did stop a lot of junk. Are any of your fuel lines rubber? If so check change them I have seen them get hard and deteriorate from the inside out so that could be from there.
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Old 05-15-2005, 11:08 AM
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This might sound dumb but that almost looks like Thistle seed........
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Old 05-15-2005, 01:43 PM
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Quote:
Originally Posted by Hippie
This might sound dumb but that almost looks like Thistle seed........
Thats not dumb Ive seen some diesel strainers that had all kinds of weeds and dirt in them. Guys are busy changing filters but they never look at the housing and replace engine for probably no good reason.
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Old 05-15-2005, 05:07 PM
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Coldknock, that's a really good answer about the debris being the remains of the fuel line sock in the tank.
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Old 05-15-2005, 05:20 PM
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Quote:
Originally Posted by coldknock
Looks like the remains of the fuel line sock that was in the tank.
Larry,

Not doubting at all that this could be the sock, but I'm curious why it would be shredded into such uniform little pieces...at least they look awfully uniform from the pic.
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Old 05-15-2005, 07:08 PM
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If thats what it is, they could have been chopped up going through the checkvalves in the pump. I installed the "in the carb" filter too, incase any more make it through the inline filter. I think there is still one in the float bowl, it loaded up and died once yesterday afternoon trying to get it through emissions. Failed of course due to the thick black smoke! LOL
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