Been working on a del sol project for a friend. When we picked it up we knew the engine ran rough, the cel was on (41-o2 sensor), and the guy didn't have a clue what he was doing. We put a new o2 sensor on it along with plugs, plug wires, cap and rotor, and cleared the CEL. Now it is still running rough it is firing on all four but runs like it's misfiring. The ignition timing is good, cam timing is good, tried my working dizzy, and the CEL is gone. I'm running low on ideas here. Anyone else got some? I think I'm going to put new grounds on it tomorrow to see if that helps. :dunno: