Just broke out the paper clip trick to diagnose the engine troubles and came up with a sub oxygen sensor/circuit or ECM problem (28). I haven't got the FSM yet and have been trying to make my way with the cliff notes version (haynes TLC's), so in short I'm having difficulty locating the things I need to connect my voltmeter to to find out what the problem is. I have about 400 miles of driving to do this weekend and not much time this week to try and figure out the lay of the land. Is this a problem I need to take to the mechanic before this weekend or will I be ok for a while until I figure out the problem?