Ok i was racing lastnight, and i was in 4th gear. When i got up to about 5500 rpms it started jumping like it was miss firing. So i put some ngk spark plugs in it, and it still does it every now and then. What is it doing? Im thinking that maybe i got bad gas? I put some more gas in it, and put some fuel injector cleaner in there. Has anyone else had this proplem?

 

yes......... I have the same problem, i dunno what it is?

running to lean mabe? fuel injectors max point i dunno but i hate it im gonna try to change my plugs tomarrow or clean them if they have stuf on them.

sound like you hit vtec for about 1 second

 

Well i changed my plugs lastnight, and it still did it. So i know thats not it. i hope it was just bad gas maybe?

 

Anyone else having these proplems

 

When idle my rpms jump up a little then go back to normal, my car is at gm right now getting fixed, and checked out.

 

When i'm driving normal and shift between 2k and 2,750 rpms i notice the the needle jumps up to 3k (250rpms from where i shift) and then back to normal but when i'm on it i never notice it jumping

 

This is an ecu/pcm problem. A lot of us have had this problem on full throttle runs in 3rd/4th gear. It'll give you a dead spot for a bit, lose about 500-1000 rpms even though you're nowhere near redline and your foot is still on the gas. I can only describe is as a loss of gas/spark. It's not your spark plugs dude. It may have something to do with the factory injectors being maxed out or a tuning issue. Hopefully the GM staged flash will fix it.

 

I've had the revs drop at idle, but thats it

 

in my 2.2 I've had the rpm stay at like 2500 with the clutch in and my foot off the throttle, it drops back after like two seconds

 

thats exactly what it is. i thought it was a loss of spark, so i changed the spark plugs.

 

sorry to dig up and old post, but T Dawg...my 06 ss/sc is doing the same thing once in a while. i was wondering if you ever figured it out and if it still does it?

 

i had an 05' cobalt ls 2.2 and at idle once and a while the idle would hunt up and down and then stabilize. i traded it in a week ago for an 06' ss s/c with g85 and sunroof and i have only driven it 300 km's and have noticed the same idle hunting that my 05' ls 2.2 did. not too concerned though, unless it becomes an issue.

 

Let me know what they found out. Mine does the same thing once in a while.