I have a 1992 dakota 3.9 automatic when you start it it will run fine but when you shut it off and restart it it will run rough and start popping real bad , you have to shut it off to clear it , the plugs where changed and wires and cap , I checked the fuel pressure and it is 34 when it runs rough it stays the same , when it is running bad you can hold the gas all the way down and it will not get over 2000 rpm it just pops real bad does anybody have any ideas thanks

Only use the same Champion spark plugs that originally came in the truck. I've seen Dodge trucks "eat" other brands of plugs and refuse to even start. Then, when Champion plugs were installed, the truck fired right up and ran perfectly.