Hey Scotty how's it going? I drive a 96 GMC Sonoma 4.3 5 speed. Here lately my truck will have a high rev when I shift gears especially when I'm about to go into fourth and another problem is having is once it's in 3rd or 4th gear it kinda accelerates on its own . Please help I'm looking forward to hearing your thoughts I really enjoy watching your videos.

generally that's fuel injection problems. Try this video first and pray it fixes it https://www.youtube.com/watch?v=NWCKvU2FmDc

I've already cleaned the throttle real good but I ain't tried that mass air flow cleaner. I'ma try it out and get back with you thanks alot Scotty your awesome keep up the good work!