![]() Outwardly the evidence is a black sooty tailpipe as well as slightly sooty plugs. If cruising at say 35mph and just enough throttle to maintain speed it'll start to load up and"buck" until the throttle is depressed, it then clears up. If I give slightly more throttle it appears to clear up and drives OK. ![]() The problem is when accelerating from a start and using just enough throttle to get the truck moving, the engine starts to bog and "load up" like a carb with a choke hanging. Stock ACDelco fuel pump and filter along with new NAPA sending unit/fuel line assy. All vacuum hoses vac checked for leaks, none found. Tuneup done last summer, cap, rotor, plugs/wires and coil. ![]() ![]() I have been putting up with this all winter and decided to tackle the problem this weekendĮngine is a TBI 350 with Thorley headers, Magnaflow cat, all else stock ![]()
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