Possible injector issues
Hey i dont want to beat a dead horse here but here go's: took the truck to the dealer for warrenty work, ujoints, 4x4 ect..... anyways i had them plug in to watch the injectors on cold starts just because i can. He says #1,4,8 are going down. Now with the truck starting easily hot and cold, gets down to 10* here now, and it does 18mpg i dont see how injectors can be failing. Seems to me like i need a treatment of rev-x. The ficm voltage was reading fine, he said. Ive had the truck for 400miles now filled the tank once and added a cetane booster and a fuel lubricant. Power service is the brand i believe, comes i a white plastic jug, pretty much sold everywhere. Anyways i need opinions. Thanks in advance.