Does your truck have an automatic tranny or a manual? Something that just popped into my head,,, have you checked your firing order??? two plug wires swithced can let an engine still run sort of well but really sucks the power out of it.
There is enough good in the worst of us and enough bad in the best of us that it does not behoove any of us to criticize the rest of us. - - Be yourself. If you are ever lost, It will be much easier to find yourself if you know who you are!
