New to list. I have an 03 HO and lost power. Thought it was the lp and put on my extra one no go. When you first crank the truck it runs fine for the first few gear changes then dies barely will go over 3000 rpm. Has a edge on it disconnected it same problem also I had a po251 and did all the checks and also swapped out the fcv no results. No code anymore Any help would be great.