My 4.3 vortec on my 96 Blazer bogs down horribly whenever I accelerate! It started just whenever you went up hills but now is so bad that it doesn't want to go at all. If I feather the gas and accelerate extremely slowly, it will work somewhat but if you try to go normally, it sounds like it's underwater or something and loses power bad. Unsure where to start to figure out the issues. Think it could maybe the catalytic converter or possibly fuel filter or plugs since it feels like it's not getting correct amount of fuel or bad fuel air mixture! Any direction to fixing would be great!

 

Check the codes and post them.

 

Did you ever find the problem ? My 2001 is doing the same

 

He hasn't been here since he posted this in 2015....

Should start a new thread...

 

I'll be glad to help you but as Don says, start a new thread.


George