General Category > Quadrajet Carb Talk and Tips

Idle Air Bypass

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ChevyZ06:
7029207...  Its on a 454 and I am having idle problems.  Cover the air horn and the idle gets better.  Ithink my throttle is open too far.

Cliff Ruggles:
It's probably a Service Replacement 7029207 and they were set-up/calibrated for the 350/350HP manual transmission engines.

They can be effectively used for big block applications, but you will need a few parts and slight modification to the idle system.

When you get time call the shop, we'll need the cam specs, compression of your 454 and can help out from there.......Cliff

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