Seem to be having an issue where my rpm's are reserved to 3k, 2k, and even 1.5k at times not letting me exceed. After replacing map and tps sensor with no luck I started looking to try to see if i was throwing any codes. I've only had the truck for about a week so i'm not sure it's history but I can't seem to get anything on the dash when i arch the plugs together. Not even a blink of the CEL. Any help or ideas would be greatly appreciated.