Quadrajet Problem Solving > Dialing in your rebuilt Quadrajet carburetor
Tuning Idle Pontiac 400 with 17058276, Comp xe262h
PonchoVia:
Thanks, will do.
PonchoVia:
Carb idle tip in likes about 12.5 on my afr gauge.
But APT tip in took 5 rounds to begin being happy. Afr shows upper 13's to low 14's. i know You don't care for afr tuning but I'm a bit concerned about maybe being too lean.
Is 5 rounds out on apt too many?
tayto:
Keep in mind if your cam has a lot of overlap your O2 could be lying to you. I do like the idea of knowing what my AFR is when the carb is setup right for future troubleshooting.
Cliff Ruggles:
Tune for results not for a particular A/F ratio. Don't forget about the distributor. Vacuum advance is a BIG player for tuning in the "normal" driving range and allows much leaner A/F ratios to be burned, increasing engine efficiency, improving power, engine performance and increasing fuel economy.......Cliff
PonchoVia:
I had forgotten to mention that I did take your advice and switched from manifold to ported vacuum for the distributor advance.
So I think I'm ok.
So just to be clear, 5 rounds out on the APT is not a concern?
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