01-20-2010, 06:53 PM
new to the site, looks great. got a stock 93 5.0 xlt. just replaced front rotors,hubs , rear gear, dizzy, plugs. recently replaced fuel pressure regulator because it kept stalling and fouled the plugs, now it runs great except when getting to the top of the gear, like its gonna shift up, it starts to miss (like a cylinder cutting out) shakes the truck. goes away when i load up on the gas(auto downshift) or hit the overdrive button. any ideas, what tester should i get to try and diagnose?? thanks