Did a unplanned river crossing at speed and got misfires on 2 and 8, dried out the coils and replaced the plugs. Still have 02 sensor malfunction and car runs like :q:q:q:q. Do I replace all for sensors and what else should I look for. PS Make sure all 6 bolts are on the 2 covers over the coils and plugs and tight because you never know when you might go for a swim.