Terrible experience. Left F250 that ran great except for cold start. Was told one injector was bad and under valve harness was bad. Was given quote of $1200. Went to pick up and bill was $1470, (oh yea, we installed new valve cover gaskets). Now truck runs rough all the time, and even harder to start. Explanation was given that that one injector is so much better than the rest, causing rough idle all the time. I left a second time, they still were unable to determine problem. Took to another shop and they replaced the relay. Starts fine now