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Unread 02-19-2012, 07:53 PM   #1
joelknopp
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1948 CJ3A 
 
Join Date: Dec 2011
Location: crestline, ca
Posts: 6
truck avenger 470 issues

first time i've posted, was running a edelbrock 1406 that i had jetted according to edelbrock's suggestions on my 3.8 buick, it ran well except for flooding/dying on uphill angles, now i have a truck avenger 470 on there and it runs like crap, haven't tried it out offroad yet, just huge loss of power and bogging/stumbling at mid-high rpm, (i'm assuming that's when the secondaries open), and no power uphill, the tips of my spark plugs are dry, and show good color, but have strong gas fumes coming out the exhaust, seems like this thing dumps out alot more fuel than the edelbrock did, i'm sure lots of ppl are running this setup, how did you make it work? any advice would be great!

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Unread 02-19-2012, 09:01 PM   #2
BSInc
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1985 CJ7 
 
Join Date: Sep 2010
Location: Kelowna, British Columbia
Posts: 275
Have you set your float levels and try different secondary springs. these are where I had to start with my 470.
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Unread 02-19-2012, 09:15 PM   #3
joelknopp
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1948 CJ3A 
 
Join Date: Dec 2011
Location: crestline, ca
Posts: 6
set float to the bottom of the clear plastic "windows", bought this carb used, and the guy had 2 of them, the extra spring he gave me was the black one as well, got 2 of the same heavier spring, so it's opening the secondaries later, higher rpm, don't think that'd hurt it, could be wrong, did you change your jets? i am at 5000 ft, i know it will be running richer than at sea level, but enough to cause these issues?
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Unread 02-21-2012, 04:07 PM   #4
Chewtoy
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1976 CJ5 
 
Join Date: Jul 2009
Location: Post Falls, Idaho
Posts: 867
I hated my 470, never could get it tuned, same kind of problems, finaly gave up and put a JY fuel injection on.

That being said, search for posts by JeepHammer, he has several amazing writeups on here as to how to tune a Holly. Having worked for them for several years, he has some great advice.
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Unread 03-01-2012, 10:47 PM   #5
joelknopp
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1948 CJ3A 
 
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Location: crestline, ca
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hahahaa! just empty every pocket, right? thanks
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Unread 03-01-2012, 10:49 PM   #6
joelknopp
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1948 CJ3A 
 
Join Date: Dec 2011
Location: crestline, ca
Posts: 6
the guy at holley says there's a problem with the check valves in the metering blocks, some kind of factory defect, gotta send it in
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