I just installed a rebuilt Qjet on my 69 WT 400 w/Ram Air IV cam. When you get on the gas and the secondaries open, it backfires. If you gently roll into the secondaries, I get the typical Qjet "moan", but the car doesn’t feel like it should acceleration-wise. I removed a Holley 850 vacuum secondary to install the Qjet and had none of these problems before. The Qjet came off Ebay, and it looked to not have been installed after the rebuild. I am not sure who the rebuilder was. The carb idles perfectly. Any help would be appreciated.
Thanks, Bill.
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