Originally Posted By: Mean buzzen half dozen A.K.A. Hank
Plugs look lean or a hot plug.

Do you have a O2 wide band reader yet? Takes out all of the guess work plus save a lot of time tuning/trouble shooting.
MBHD


Hi, no I do not, just heard about them. Do you have recommendation for sensor and reader?

I changed to heavier spring, brown color, one off of the heaviest and the worst of the bogging and backfire is gone! The engine didn't like the secondaries opening so soon. Upper RPMS are awesome. But lower RPMS still not living up to potential. Probably need different jets, but I'd like to try the O2 sensor, be more scientific and less experimental.

Thanks!

Mark
'67 Camaro L6-250