2007 Altima with 174,000 miles was missing and not able to go above 50 mph. They immediately found a hole in the side of radiator and little to no fluid in engine. Replaced radiator and hoses, then vehicle seemed to be running fine until a few days later when it started missing again. It appears the overheating had contributed to the valve cover being warped, thereby causing one of the coils and some spark plugs to be damaged. Once those items were replace, the vehicle has been running great with no further issues. This has been a good vehicle with only normal maintenance (Oil Change/Tires/etc...) until this issue cropped up. My Son should have let me know that the vehicle was running hot, but all is good now. I appreciate Robbies's Team for straight-forward diagnostics and honest quotes.