Quote
Maybe bowl vent valve failure? There is a vent line from the bowl of the carb to the canister. Plug that and report back.


^^ This. Same issues on my own 2.6L truck and the bowl vent valve needed to be plugged. I stuck an old drill bit in mine ad secured it with a zip tie. Been like that a few thousand miles now. Went from hardly running, sputtering, thought it was a bad fuel filter, to smooth and relatively powerful.


1987 Raider, 346K miles and going strong -31" tires, otherwise stock.
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