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misfire

  1. Problems and Service
    06 LS 2.2 Automatic completely stock 209,000 miles. Parts replaced and diagnostics. Plugs, boots, coil, and ICM replaced. Compression 150 across the board. Fuel pump replaced good pressure. Timing marks all lined up. Injectors all good. So I have a random misfire that used to come and go but...
  2. Problems and Service
    I have a misfire on cylinder #3, It only happens after revving the engine really high then when I idle, it stops working. When I drive up to maybe 25 mp/h it kicks back in and I feel it jolt and is fine until I idle. I have replaced spark plugs for all cylinders, and the coil pack for cylinder...
  3. Problems and Service
    Another P0302: Misfire on Cylinder 2 Issue Hello, everyone. I've extensively read through as many topics as I can find on this issue already and I'm hoping with fresh context, maybe a resolution can be found. My Cobalt runs beautifully under load. Smooth, powerful, even. At idle, though, it...
  4. Problems and Service
    Hey Y'all, Looking for advice and tips, been reading thru the various reports on P0301 ~ 04 codes. Here is the deal with mama's little crusier. It is a very stock 2009 LS with the 2.2 ecotec, sitting about 105K. About six months back it started spiting a P0304 code, intermitantly. At 102K it...
  5. Problems and Service
    About two months ago my car threw a code for a multiple misfire, I changed the coil, plugs, and wires.. None of this fixed the issue, so I checked valves and fuel related issue, still no change. Finally, I replaced the ignition control module, which fixed the issue. Now the misfire is back...
  6. Problems and Service
    Ok I need some help with this problem, seems like Im chasing a ghost. I have a 2007 4Dr 2.2L. Problem first started about 3 months ago. It started to sputter and light come on and says - P0302 Cylinder 2 Misfire Detected so I changed out all spark plugs and did a oil change since it was due...
  7. Problems and Service
    What is going on here? 06 Cobalt LS 2.2 misfire? - YouTube I recently changed out the coil pack and the plus MAYBE a year ago. This only started happening after getting my car back from getting my ignition recalls fixed. Before I try to get them to tow my car to address this issue, I want to...
  8. Problems and Service
    My 2008 Chevy Cobalt has a CEL - code P0303. I've changed spark plugs and coil packs, but that hasn't fixed it. The car runs okay for the most part unless I am sitting at a stop light or idling somewhere, then it idles roughly and the CEL light starts flashing. I'm not a mechanic, but am...
  9. Problems and Service
    My 2008 Cobalt has a Cylinder 3 misfire code, P0303. I've changed spark plugs and coil packs, which didn't help. I have Torque and ran some testing, but I have no idea what the results mean. Can anyone help, please? Mode $06 report generated by Torque for Android...
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