Re: Quadrajet troubleshooting
I sounds like the secondary air-valve spring is set a little too tight, which is preventing the secondary air-valve (the top secondary butterflies) from opening. There is an adjustment on the driverís side of the carburetor that you can use to adjust the spring tension. Itís usually adjusted with a small screwdriver and held in place with an allen screw. Adjust in small increments Ė it doesnít take much of an adjustment to make a big difference. Iíd try loosening the setting about a 1/4 turn and see if that makes a difference.
69 RS, Hugger orange/black, Deluxe interior, Sony AM/FM/XM/CD, PS & PB. 355, forged pistons, Eagle rods, balanced, Iron Eagles, 9.4:1 CR, .038 quench, XR270HR Cam, Z28 intake, FAST-EZ EFI 2.0, Thorley Tri-Ys, TCI 700R4, 2400 stall, 3.42 posi