I agree that you need more diagnostic tools, because it is almost impossible to judge whether a spark or fuel problem by "feel". I don't know how long the cheap in-line spark testers w/ neon bulb from Harbor Freight can run, but I once drove with one in-place 10 miles home because I wasn't going to take it out once I got the car started (XR700 ignition module had failed). Next time you have the exhaust pipe off, weld in an O2 bung so you will be ready for an O/F indicator. They are cheap and come with a plug.