[nomad957]

Long time lurker and I have not introduced myself yet. This has had all of the answers that I ever wanted. Great people also. I felt compelled to chime in on this one. I had the same problem when I first got my truck. I checked everything that has been brought up and still my 230 had no speed, ran great just, no speed and if I was too aggressive under load it would pop. I blamed it on just being a 230. I was replacing my exhaust and I discovered I had over looked the heat riser. The heat riser was rusted stuck in about the 1/3 open position and restricting the exhaust. If you can’t get air out can’t get more air in. Woke it up and ran great.