I posted a couple of years ago about lack of power at 40 mph. Good power until 40 mph then nothing. It was also making a low thumping sound from the air intake. Well, I replaced the air intake and timing chain and nothing changed until one day on the highway. I had the pedal to the floor (as usual) going 45 mph and all of a sudden, a huge back-fire from the exhaust and the truck shot forward to a great 75 mph. It must have been something clogging the cat-converter. Problem Solved!
- posted
14 years ago