The little Geo is going to undergo open powerplant surgery. Thursday night it started running rough. Last night I was able to do some diagnostics and it looks like I've probably got burnt valves on cylinders 2 &3. So I'll do a cylinder leakdown test later this morning to confirm then heads are going to roll! or at least it will be coming off. Heck I might have to do a cam upgrade while it is off, who knows.