Sixpack outboard carbs not flowing fuel

[Go mango]

Hi all,
I would appreciate any assistance from the sixpack experts. Motor is 440. Eddy heads. Bullet solid lifter [email protected]. 541 lift. I suspect that my outboard carbs are not flowing fuel when the secondaries open. Motor starts detonating when the seocondaries kick in. A/F goes to 19:1. Float levels have been verified. Ive jetted up to 91, no change. Been chasing this problem for months. Throttle bores are dry with no hint of fuel residue. Quick fuel metering plates are installed on all three carbs. Ive been running the sixpack for a couple years. Center carb is dialed in perfectly. Motor runs hard up to 4800. 13.5 A/f. No problems until the secondaries kick in. Thanks in advance

 

[493 Mike]

Have you checked the fuel passages in those metering plates? Correct gaskets on plates? I'm using QF plates on mine and they work great.
Mike

 

[HEMI-ITIS]

Have you spoken with QF??

 

[D575]

Fouled plugs, Pull em and see..