Curious if there's anywhere I can get idle readings (what the tach SHOULD) say for my car (06 LT Coupe). Fighting a misfiring issue for FOREVER now, and the other day, I noticed that when I started my car, the reading seemed higher than normal. (1250ish right at start up, yet she'll run between 500-750 when I'm coming to a stop. Just not sure if these are "normal" readings or not.) Thanks! :-)

 

It's normal for it to idle higher on a cold start while the engine warms up. I don't know the exact idle speed in the 2.2, but it's likely between 600-800 rpm.

 

Thanks!! She's right about where she needs to be, from the sounds of things, then. I'm between 1125 and 1250 on a cold start, and anywhere from 625 to 750 on idle at norm. temp. Thanks again. I just noticed the higher cold start and am probably being more than enough on the paranoid edge due to a 6 month ish long misfire issue.

 

ya sounds bout right man i gotta 2.2, anytime its a cold start itll do that..she fine

 

She's not fine, but her idle is. :-) Can't go more than 2 weeks without my CEL coming on with a P0300 for misfires. :-( But that's another issue...LOL.

 

Ya my cel comes on whenever the hell it wants to i always check it and it passes so, maybe just needs to be re tuned or sumthin

 

Yeah, I wish that were my case. She's misfiring so bad that it shakes my car (with no CEL). :-( Been fighting since November, and I'm scared to death that I'm going to totally kill my cat if we can't get her figured out soon.

 

Mine sits right around 730

 

ya everyonce ina while i floor it and the engine shuts down cel comes on, says engine power reduced and the whole car is shaking like its having a seizure...i turn it on and off a couple times then its back to normal...its effed up man i know it is not good for the car its happened like 10 times....ive asked around and people dont know what the hell is wrong with my car

 

My woman's car experienced a similar issue where the whole car had the shakes, and it turned out to be a crank sensor. It literally felt like it was running on 2 or 3 cyl. This was on a 2.4 Cavalier.

 

same here.

 

You're gonna be replacing the engine if you don't get it figured out. Take it in.

 

Ok this is what my cobalt does, and everytime i try to explain it they think im crazy
it sounds like a suped up lawn mower

 

Yeah, I tried explaining the shaking, and my wrench didn't buy it til he actually SAW it.



Update: My CEL came on yesterday morning when I fired her up to go to work. I started her up at 430ish am, and it was on. My wrench isn't open on the weekends of course, so I decided I'd wait til Monday and take her in to him. Well, the CEL went off the same day that it showed up. By 4ish pm yesterday, it was off again, after being on when I went to work, on my lunch hour, and when I went home around 3ish. Any ideas???

 

The code should still be in there even if the light went off. Can you take it somewhere (Autozone) and have it read?

 

well my cel comes on for 5 mins then leaves or a day then leaves then itll be good for a week or two then it happens again, if it happens one more time imma take a video of it and show the mechanics whats up, it gets annoying sometimes i cant go wot, wich doesnt happen all that often