my dodge ram 1500 5.9l surges up about 100 to 200 rpm while driving then goes right back to where it was, whether it is in cruise or using gas peddle =. the truck seems like it runs fine otherwise i have replaced both 02 sensors and have checked for vaccum leaks but did not find any? i have also recently replaced the fuel filter, installed a cool air intake with a new throttle body gasket, and i have straight piped the truck as well.
This video might help. Click on the “full description” header and read all the notes. The owner eventually found the problem was a bad MAP sensor.