I have a 1997 5.2 4x4. Changed cap rotor plugs and wires. It idles rough and misses/hesitates until 3000rpm all sensors are working and no codes are presant. Anyone have any ideas?
Please help.
You should recheck the gaps on the spark plugs, one of them could be off.
And you also said you changed the cap and rotor, so you could have possibly messed up the timing when you installed the new parts, not saying you did, just naming off possibilities.
If you double checked yourself on all the above try pulling codes see if you are having Cam/Crank sensor issues. Had similar issues and it was my crank sensor.