what is causing my cylinder one misfire?
Asked by srenken May 26, 2014 at 09:58 PM about the 2006 Chevrolet Cobalt
Question type: Maintenance & Repair
I own a 2006 chevy cobalt it has around 130k and never had any issues, only routine oil changes. I had a ignition switch recall called on my car, a day after hearing of the recall, i was driving on the highway going around 75 mph, my car stalled, i started it back up and drove it off the highway and to a gas station, it had make some thumping sounds, after turning my car off, i couldnt start it back up again, it turns over but there was a loud thumping, almost like a knock. My check engine light had come on at this point. There is no fluids leaking, and had no smoking. My car turns over but sounds horrible, it will not drive. I took my car to a gm dealership to allow them to fix the recall, during the recall fix they ran a diagnostic test and it showed i had a cylinder one misfire. Im not sure what could be causing this issue, but i know i dont want to spend a whole lot of money. I have a few things in mind that i have thought it could be, but i need a second opinion.
19 Answers
http://www.obd-codes.com/p0301 -- check this out for possible causes and solutions. But the thumping has me scratching my head. Have you checked your oil and coolant levels?
My boyfriend really handles most of it , but we are scratching our heads too. & yeah everything is fine. We were thinking a bad spark plug or coil pack- thanks.
but i just wasnt sure if it could be something else making that noise, cause it sounds pretty nasty
TopShadeTree answered 10 years ago
The sound you heard may have been a timing issue,maybe jumped a few cogs,would explain sudden cut off at 75 mph.and misfire on #1., Come on DANDY think>>: )
From what I am finding about your engine it is an interference engine. Meaning that if timing chain jumps time the pistons can come in contact with the valves. A bent valve would cause a misfire and possibly a knocking sound. I would do a compression check on all cylinders. Any cylinders showing 0 psi will have bent valves.
Also finding where some of these have what is described as a timing chain tensioner rattle.
http://www.chevyhhr.net/forums/how-tutorial-library-21/timing-chain- tensioner-replacement-fix-engine-rattle-46159/ -- check this out. Video on here of a minor rattle sound. See if it kinda sounds like yours
Ok topshadetree. I a little slow some times. Lol.
TopShadeTree answered 10 years ago
you pretty good,your rating is #3 : )
yes. You give good answers. You will climb fast.
I had a 2006 Chevy Cobalt ls and it had an issue where it stopped running all together and when I checked the plugs cylinders 1 and 2 were crushing the ground points on the plugs now I have an 08 cobalt with the same 2.2 and it has a misfire on cylinder 1
I have a 2006 Chevy Cobalt and it’s shifting a lil bad and so I took it to get looked out and I had code 300 what does that mean?
I had random misfires under 60mph for months to where it wasn't comfortable to even drive and we couldn't figure out the problem. We replaced everything from fuel to electrical and exhaust/intake. Finally a light came on for abs and esc service. We replaced the wheel bearing and wa la it was fixed the second i drove it after that. We believe it had a bad wheel sensor that told the cu it was spinning causing the ecu to say hey traction control kick in which intentionally misfires the engine so you can regrip the road. Just a suggestion for the running rich at cruise code and/or service abs traction and esc codes. Even no codes at all except random misfires as it took forever for the wheel code to pop up.
Logan, how did you know which wheel bearing to change? I’m having the same problem! Thanks for the input!
was that a rear wheel bearing by chance you replaced?
2009 Chevrolet cobalt #2 plug misfiring?
I have a 2009 chevy cobalt lt. Let me start from beginning car was running fine no issues then I was leaving work one day it would start ruff idle white smoke gas spitting out tail pipe let my brother in law look at it he took the the 4 sparkplug out we looked at them number 3 looks bad so we switched them around put everything back together started it up run brand new again actually ran better than it was drove for 2 or 3 months no problems then one day leaving work same issue so I rotated the sparkplugs with new ones back to running brand new again another 2 months this whole time I'm driving 30 mins back and forth to work 5 days a week it just happened again rotate the sparkplug running fine now what is causing this problem I know it have to be something stupid it always is.
