0302 cylinder 2 misfire
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Thread: 0302 cylinder 2 misfire

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    0302 cylinder 2 misfire

    My wife's 09 ctsv continues to throw a 0302 misfire cylinder 2 misfire code when using remote start. I pulled and replaced all spark plugs. #2 was fowled compared to the others. New plug wires and moved the original #2 ignition coil to another location. With all of that it will shut off remote start with a check engine light. I can sit in it at idle with it turned on and no codes. Driving is just like normal. 90,000 miles on it and mostly stock. It sees a lot of highway miles. Any ideas or recommendations would be appreciated.

    It's been doing it on cold days only so far. I'm wondering if something is kicking on and pulling some current away. Maybe new battery time??? I emptied the catch can just in case it was full but nothing there. I was thinking something could've been coming in through the intake. I have put in some sea foam lately. Maybe it's not liking it under remote start.

    Thanks.

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    The engine light came back on this morning under idle without remote start. Still nothing noticeable while driving. I did clean the airrade filter and reapply oil to it a few weeks ago. I am going to pull the sensors on the intake and clean them just in case of oil coating.
    09 CTSV Auto Sedan Thunder Grey
    - Airrade Intake
    - Rosen Headrest TV's
    - Performance Spare Tire Kit
    - Backup Camera in the rearview mirror

    09 G8 GT
    - Roto Fab CAI
    - Doug Thorley LT's & Mid Muffler Delete with Xpipe
    - Cam and DOD Delete
    - Dynotuned by Mad Tunes Racing (409rwhp)
    - Polished camaro 20's

    07 Chrysler Aspen

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    It could be a bad fuel injector.

    My previous car had a misfire in cylinder three and I did all of the troubleshooting steps that could be done in the "spark" system and never once thought that maybe the spark was there and the fuel was not there. I had to change all the injectors out anyways to go E-85 and guess what, new injectors, no more misfire.
    Grandpa'scar likes this.
    2012 Cadillac CTS-V | Sedan | Automatic | Crystal Red Tintcoat

    Stage 1: Remote Datalog Tuned by Pat G | Griptech 2.45 Pulley | Texas Speed 2" Headers to Offroad X-Pipe to Stock Mufflers | FIC 1000 Injectors (Pump 93 Gas) | Airaid CAI with Green Filter | Mamo-Ported LS7 Throttle Body - 560 RWHP 567 RWTQ

    Others: NGK TR7IX Spark Plugs @ ~ .032" | SMC Dual-Inline Catch Can | Lingenfelter Solid Isolator | Belden Spark Plug Wires | Gates Belt | WeaponX LED DRLs and HID Fogs | LED Internal and License Plate Lights | RHO License Plate Relocator | DashLogic

    Previous: 2013 Mustang GT - Automatic - Bolt Ons (N.A.) & E85 - 410 RWHP

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    Thanks for the input. The injector is my next step. It may need a cleaning.
    09 CTSV Auto Sedan Thunder Grey
    - Airrade Intake
    - Rosen Headrest TV's
    - Performance Spare Tire Kit
    - Backup Camera in the rearview mirror

    09 G8 GT
    - Roto Fab CAI
    - Doug Thorley LT's & Mid Muffler Delete with Xpipe
    - Cam and DOD Delete
    - Dynotuned by Mad Tunes Racing (409rwhp)
    - Polished camaro 20's

    07 Chrysler Aspen

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    The code disappeared for a week and now it's back after filling up the car with gas. Next step is I'm changing the injector but I'm open to any other suggestions on things to watch for. The misfire isn't noticeable, yet.

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    swap the injector with another one and see if the misfire moves. if not, then do the same on the coil pack, then wire.
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    I put in a new injector a few days ago. So far it has not caused a SEL to come back on.
    12CoupeV likes this.
    09 CTSV Auto Sedan Thunder Grey
    - Airrade Intake
    - Rosen Headrest TV's
    - Performance Spare Tire Kit
    - Backup Camera in the rearview mirror

    09 G8 GT
    - Roto Fab CAI
    - Doug Thorley LT's & Mid Muffler Delete with Xpipe
    - Cam and DOD Delete
    - Dynotuned by Mad Tunes Racing (409rwhp)
    - Polished camaro 20's

    07 Chrysler Aspen

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    probably injector as others have said. good luck
    Grandpa'scar likes this.

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    When mine misfired, the problem was about the spark, so I replaced all of them and had no problem since.

  11. #10
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    Hoped this fixed it. I had a similar problem on my friends in cylinder #1, believe it or not, it was an intermittent connection in the Coil pack harness.

    I would assure you, this is VERY Rare..... normally as others have said, either unplug injectors remove plugs and test spark... or do the swap. I prefer to see the sparks but it is important to unplug the injectors and/or fuel pump so you are not spraying gas thru your cats or worse out the hole to ignite.

    Then just hold plug on the head while someone cranks the engine over, switch wires, switch coil packs switch plugs to eliminate spark as a variable.

    Hope you have it fixed!
    Aspiring to be V'd!

    SS Camaro was too small.


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