Hello my fellow monte carloers, for about 2 weeks now my car has been having issues, what happens is that at low rpm (up to 2k) the car has no power. It is most noticeable when it gets to running temperature and you take off from a dead stop but it does it in every gear
There is also plunging sometimes. Above 2k rpm the car runs great. I would say egr. Valve but I have gotten a check engine light. Thank you

 

Sorry I mean I have not gotten a check engine light
Also, car seems to idle normal when it's in park and neutral but not in drive, I really need to figure out what it is

 

My first impulse possibly would suspect a plugged cat. My second impulse is is some maintenance may just need done. Here's a thread full of ideas:
https://montecarloforum.com/forum/fw...0-miles-46078/

 

I will second, Jason's opinion on the cat being the culprit

 

I too have a issue with mid range performance,bogged down sound,poor mpg, cleaned the MAF sensor,K&N CAI and Seafoam? bad cat??

 

You gotta watch it with that Seafoam. I know a lot of members love the stuff and swear by it. It's fun stuff, but it can plug a cat up. Try CataClean. Its the only product I know of designed to clean the converter

 

My cat just uses it's tongue...

 

I don't think it is the cat. If it was he would have lack of power throughout the rpm range, difficulty pulling hills, intermittent misfire amd erratic shifting.

I'm thinking along the lines of a binding IAC or a binding throttle plate.

binding = carbon buildup.

 

It is not the cat, I took co2 sensor off to release pressure and drove like that and still did the sane thing, plus I've checked the cat several times after driving and it is not red .
I'm thinking mike is right, so what should I do?