This truck is driving me crazy. Drove it one day, everything's fine. Next day I start it, it runs for about a minute or two, and then acts like I just pulled the choke on it, spits and sputters and the tach jumps around. Shut it off, wait ten or fifteen minutes and it's fine. I thought fuel delivery, renewed everything, still does it. My mechanic thinks it's electrical so we change the ignition parts, wires, plugs, etc., no change. He thinks maybe something's going on with the tach. Disconnect it and still the same. This truck only has 28K miles on it but it did sit unused for a number of years. Had a governed carb on it which I changed to an AFB with a manual choke. Ran fantastic until now.
Any ideas? Thanks