Ok my blazer wants to rev up and down after I let off gas to coast. It dies sometimes too. Any good ideas? Lol

 

possible vacuum leak, maybe the egr getting stuck open. no check engine light?

 

That sounds like an EGR problem to me. Check to make sure the pintle isn't stuck open by a chunk of carbon.

 

**Moved to engine and transmission**

 

Not sure where that's at but I'll find it. The lights go dim on it I think too but the battery isn't losing power. Its kinda dangerous cuz I lose power steering. What if an old lady were driving it! Lol

 

Don't think its a vaccum leak. Light comes on and off but that could be anything

 

Tech Article (DIY) section to the rescue --> EGR Valve Cleaning

If the "light" you are talking about is the check engine light, having the PCM scanned will give you direction as to what might be causing it. Whenever the check engine light comes on, the PCM should be scanned for stored/pending codes to get an idea of what the PCM is seeing.

Another idea on your problem could be a sticky IAC (idle air control) valve. There is another Tech Article that goes through the throttle body removal to get it good and clean. You can familiarize yourself with the tech articles available by clicking on the index link in my signature.

 

I'll figure it out thanks. I wanna take my catalytic converter off lol. Saw a video and it sounded kinda beast. Will I get more power or will it just mess something up?