i've got a b18c1 in my del sol, with a turbo on it, was tuning it the other day when the tach started bouncing around at 5k rpms in WOT. REPLACED THE DISTRIBUTOR, and it's still bouncing tach and now it's started misfiring while WOT around 5k rpms. the ecu is good, we put it in another car and it runs fine, we replaced the wires, looked at the spark plugs, and now we're out of ideas.
A/F ratio looks fine also.
anyone have any ideas/suggestions?