My wife talked me into upgrading my landlord projects truck from an '89 Ford Ranger to a '97, because the new one has this amazing new thing called AC, which comes in handy here in Texas. For a while, though, the “ice cold AC” was about the only thing that worked well.
A shop that checked the truck for me before I bought it missed something and decided later that the truck needed a valve job to correct a misfire. That’s done, and the check-engine light stays off, but I still notice some brief hesitation (“bucking?”) on acceleration, mainly on hills. I tried cleaning the mass air sensor. Nope. I’ve ordered spark plugs and wires. We’ll see.
But of course this is the “throwing parts at it” strategy. Other suggestions I’ve seen involve the fuel injectors, the cam position sensor, a seemingly non-existent flex fuel sensor, vacuum leaks and oxygen sensors. The cam position sensor and hard-to-reach fuel injectors are beyond my comfort level to work on. What do you suggest?