by any chance did you spray some tb cleaner in the connection for the throttle actuator control cause that happend to me and i had to buy a new tb

 

No, plus I also used actual TB cleaner, not WD-40. I only sprayed around the inside and on the butterfly.

 

how did it make out on the fuel rail issue? I am having a rough idle well. I was recommend from the stealership to get the TB cleaned by them.

 

Ah, I still haven't gotten to that damn fuel rail! The didn't help my issue though.

 

I have a 2006 Chevy Cobalt and it has been idling pretty rough and the engine has been making this weird grumbling noise when I am stopped at a light. I changed out my plugs and put in some after market plugs and the the engine does have more power now but it still has the same grumble. I took it to the dealer and come to find out I need to change out the coil pack and the boots that go over the plugs. The dealer was going to charge me 700 dollars to fix it but I can do it on my own for just about 200.00. If anyone has any questions about this post please don't hesitate and let me know how I can help.

 

What do you mean "grumble"?

How many miles were you at?

 

mine just starting doing this for a few i got the engine power reduced then i turned the car off and started it again then nothing but i do have a check engine light im hoping its just a plug fouled out. i literally just put new injectors in today everything was clean. it sounds like a wrx for real though. and if i barelt even get on the gas it sounds like a lawn mower with a really bad miss. this **** has got me freaked out i have never seen a car do this before. i drive a 2005 ss/sc btw. also i just got my computer back from ott from getting tuned it didnt do it before then i start it up and it did it i drove it to the parts store to get the codes read and my obd-2 wont read. due to a shitty radio install place. it ran fine until i got the computer back and put it in.

any suggestions

quick side note when i got back from the parts place the dip stick was poped out...not good but there is no water in the oil so i am really hoping its not a set of rings

 

may have a p0300???

 

its not like a bouncing idle at all its normal it sits at like 900-950 all day

 

I have this problem. Have a thread on it as well. Throwing the P0300 code and now the P0172. Comes and goes every other day. Any help I can figure it out.

 

i have an exhaust leak coming from under the hood it looks like flexible hose or an accordian but it hooks up to the catillitic converter. and ideas on how to just patch the hole instead of having to replace the cat converter

 

check the connectors for the fuel injectors mine popped of a little same problem popped it back on and worked like champ

 

Who was that directed at?

 

Off topic but ... take that in to a dealer and they will replace it . The warranty on that part is 8years 80K miles and i think they just extended that even more.

 

Should of got a letter from GM giving you the 10 years on the cat.

 

Hey Bro you might want to check your coil pack. I took my car to the dealer and they told me that my coil pack and boots were all bad. I dont know what year yours is but if you have an 05 or 06 changing your coil pack is easy. My name is Jared let me know if you have any questions.

 

I noticed mine idled funny after installing my K&N Intake before I got it tuned.

 

Wouldn't that throw a code?

..Or this?

 

mine didnt for like a week then after that yes