Looking for ideas on #5 cylinder misfire. A week ago I replaced the timing belt, tensioner assembly, water pump, crank and cam sensor and the car ran great for the past week. Then when you started it up it ran rough and would die. I ran a scan and came up with PO340 cam sensor and PO305. Adjusted cam sensor and the car would run but at idle was rough. Code PO305 popped up again. Not sure if this caused problem but my daughter put a bottle of Lucas injector cleaner in a full tank of gas then a day or two later the problem started. Thanks for any thoughts.