Quadrajet Problem Solving > Dialing in your rebuilt Quadrajet carburetor

Secondary Tuning Question

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davis95:
Pull-off is new and completely opens in less than 2 1/2 seconds. Fresh rebuild on carb. I'll be doing some more test and tuning today. I haven't been back in the car since I first posted this. I'm hopeful that the inline filter was my fuel restriction. Will update. Thanks, Doug

Toronado:
Simple sec. not getting enuf fuel
& closing down the air flap by tighting spring is helping
by restricting air. The air flap
spring should not have much resistance.
The accelerator pump shot needs to be
checked for adequate fuel. Check
my earlier post similar problem,
it was never the rods and hanger
wrong direction just trying to save you hours.

davis95:
Will check the acc pump. Thanks.

davis95:
Just got back from 2 more test runs. I backed the spring off 1/8 turn and the popping came back. I tightened it back 1/8 turn and it pulls hard and never misses a beat from dead stop to 125 mph. The spring is 1 1/4 turn past flap closing. Could this spring be that weak from age, or does is still sound like I could have a fuel delivery problem? It pulls great, but I wonder if I can get it even better.

Cliff Ruggles:
Spring could be weak, and the cam worn down/loose on the shaft.

Our HP kits come with those parts, we always replace them here.  The cam and spring are also available separately off the website.........Cliff

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