I went on a 20 mile trip with a elevation difference of about 1000 feet, going uphill. it was gutless. more than once, I had to downshift to 3rd just to get the speed up to 50 mph. This was after plugs and wires.
Today, I changed fuel filter and put a 4 liter radiator in. EVEN MORE GUTLESS! shifting to second and giving it gas yields the truck almost dying (acting like its flooding out). Third gear, same thing. Also, now it is popping out of the exhaust on the passenger side like its backfiring almost.
At this point I am almost done with the truck... AND I JUST GOT IT!
Help me please...