Well I got the heads rebuilt, new intake gaskets, new crank/ and cam sensors, belt, hoses, plugs, cap, wires, new FPR, lifters, and now I have a stange miss! I am not throwing any codes, I keep checking. The truck runs better than it ever has, gets up and goes from a start. Cruises at highway speeds no problem. The miss happens at idle, worse when I have my foot on the brake, but still happens at idle if in park. Its a regular even miss/ shudder. & it is driving me CRAZY!:grrrrrr: Any ideas what I should look at? No codes has me stumped as regular as it is and at idle I should have some code shouldn't I? As always much thanks for any and all help.