I have this 1962 - 292 YBlock in the 1955 Fairlane I bought 5 years ago. The carb was new 4 years ago and is a two barrel and was running fine until about a few weeks ago. At least I thought it was a carb problem. The car starts and Idles fine. after warm up when driven there is a stuttering feeling on acceleration. The car is a 3 speed standard with overdrive, but the overdrive is not working. Driving it as just standard shift. I am not real good with carbs but have made some miner adjustment to the mix. I thought at first it was running rich. so I leaned it out a bit. It didn't do much good. I tried again and still not good results. I brought it back just short of where it was and it runs but stutters on acceleration. If you go real easy on accelerating and shift it's smoother. I do have an electric fuel pump I put on this spring, but that has been running fine so far. The PSI on it is rated within the cars limits. I have check points and cleaned, I have installed a better set of plugs. Don't see any arcing on wires. I did check accelerator pump how it's working by looking in throat and working pump and gas stream is strong and no air as far as I can tell. Kinda stumped right now and getting to where I need to put it in storge soon here in Minnesota. Any ideas! By the way I forgot, I did as manual suggested and turned both settings all the way down to stop and brought them back a turn and a half as suggested. When I took it for test it ran just fine that day had good acceleration and pep. But when I took it out on a run on this Tuesday it was stuttering again.
Sounds like an intermittent fuel pressure problem to me, I’ve see where there is something in the tank that floats around and occasionally blocks the pickup. the other thing to look at is ignition. A lot of carburetor problems are ignition, I chased why I thought was a bad fuel pump that turned out to be a cracked distributor cap. don’t trust new parts, I had a brand new fuel pump that intermittently put out 18psi
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