I have a 98 wagon that I just picked up. It's got 165k on the clock. I'm noticing that it misses a bit when first started (maybe first 1 minute while driving or maybe a little more if just idling). Then it clears up.
I had some codes. I had coolant leaking out of the reservoir (replaced it) and that may have set one of them. Here are the codes that came up. I cleared them and they haven't come back up in around 100 miles or so of driving so far:
P0402 Exhaust Gas Recirculation Flow Excessive Detected P0401 Exhaust Gas Recirculation Flow Insufficient Detected P0455 Evaporative Emission Control System Leak Detected (gross leak) P0117 Engine Coolant Temperature Circuit Low Input