UPDATE and a little advise requested. After a great deal of diagnostic time I have gotten Dead Pedal resolved. Ultimately you guys were spot on, VP44 was failing. I did something that I am starting to regret now. In the process of changing the injector pump & lift pump I convinced myself that it would be a good time to improve my injectors... Needless to say, I did and now I have ticking noise at idle. The truck runs well but the ticking or knocking at idle is worrisome. The truck has just over 115,000 miles. I am going to adjust the valve lash now. Do you think that could be the problem? Bad injector? Any ideas where this ticking/knocking noise would come from after injector replacement?
Any and all advise would be greatly appreciated!!