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I had a similar issue with my 85. I have a 350 with the stock quadrajet and the truck idled great, but had serious issues bogging out, shifting, basically ran like crap under load. After changing the fuel filter and the vacuum lines, with no positive results I decided to buy a new carb. Since the motor is still basically stock I decided to try a rebuilt quadrajet from National Carburetor. Price was $175 plus shipping. Took all of 30 minutes to install and holy crap it was like driving a brand new truck. I had fought that carb for 3 years and I'm just kicking myself because if I would have know that $175 could get you this much return I would have done it day one. The carb looked brand new and the customer service was excellent. Trust me, the results were amazing. So, if you like me and using it for a daily driver now, but potentially looking to upgrade later, this is the way to go. I decided that when I'm ready to turn the heat up, I will probably buy a different carb and intake, but for now I'm extremely satisfied with the performance and mileage that it provides.
What is your base timing set at, what advance can are you running, and where is your vacuum advance plugged in, manifold or ported vacuum?
Quote from: rich weyand on December 22, 2015, 07:38:18 PMWhat is your base timing set at, what advance can are you running, and where is your vacuum advance plugged in, manifold or ported vacuum?timing was my biggest problem then i plugged my vacuum advance to the manifold vacuum and now my truck runs like she never did before.