truck avenger 470 issues -
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post #1 of 6 Old 02-19-2012, 07:53 PM Thread Starter
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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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post #2 of 6 Old 02-19-2012, 09:01 PM
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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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post #3 of 6 Old 02-19-2012, 09:15 PM Thread Starter
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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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post #4 of 6 Old 02-21-2012, 04:07 PM
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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.

With a great Jeep comes an empty wallet.
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post #5 of 6 Old 03-01-2012, 10:47 PM Thread Starter
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hahahaa! just empty every pocket, right? thanks
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post #6 of 6 Old 03-01-2012, 10:49 PM Thread Starter
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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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