Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem

Quadrajet has more power when choke is on

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Brboles:
I have a 1986 c20 350 factory carb 17085003. The truck has good power going down the road but seems to have better power when the choke is on. The timing is set good. Just can

Brboles:
My timing is set for 12 degrees btdc at idle. Is that too low and causing my issue?

429bbf:
i would say no . seems like its running to lean . I'm surprised that's the stock carb if my memory is correct most of them were on 454s in 1 ton chassis what type of gas are you running and did it just start doing this . they add more ethanal to the gas is some areas of the country this time of year . can you get some straight 91 and see how it runs ? hth.

Brboles:
I sure can. I will try it for sure. I just assumed that it was the original carb. I

Brboles:
I will certainly try. I just thought this was the original carb and it could have certainly been changed through the years. I have tried to riches truck idle mixture but no change really. I have a new distributor cap and rotor with AC Delco plugs rapid fire .045 gap. I have noticed that there is a sharp bend in the fuel line going into the carb. Could that be part of my problem?

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