I have a 94 Chevy c 1500 the last 2 days it started sounding really weird and almost bogging down, I guess. I'm having a really hard time trying to explain what it's doing. When I start the truck it sounds normal but then after 3 to 5 minutes at idle it starts to physically shake the truck and sounds like I'm constantly revving the engine very quickly and violently if that even makes sense. Or if I start to drive it immediately starts to feel like it's going to shut off and die but it never does. This truck has been a rock, it's been a solid truck but recently I'm just at my breaking point with it. I know that if I actually dive into it or if I wasn't so frustrated with it and took a moment to think about it I'd be able to figure it out but I think I'm just too close to it and I have no idea where to even begin to look to figure out what's going on with it. It's one of those things where when you're too close to a job and you just can't see what's right in front of you. So if anybody could give me any kind of advice or a place to start looking I would greatly appreciate it. Thank you