Bucking

my 99 with the 4.3 liter seems to have developed a miss at engine speeds above 2200rpm no matter where i have my foot into the throttle. There is no check engine code coming up at the moment. it has just started today and has been raining all day really bad so i think the moisture has something to do wiht it.I am almost sure it is just in need of a good tune up. if anyone else has had thi prob and it ended up beeing a sensor then let me know

oldschool, did you ever find out why it was bucking? I am having the same problem with my 99 4.3, in the rain.

If it is olny giving you guys problems when it is raining i would say it is time for a new cap and rotor and if it has been a while since they were changed last, plugs and wires as well. My dad has a 93 with the 5.7 in it and it will run fine till one day when it is raining and it will not start untill you replace the cap and rotor.