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    Thread: HELP!! Blinking check engine light.. runs very rough

    1. 02-02-2009 06:14 PM #1
      i have a 2003 1.8T. on the way home the car started running very rough and the check engine light is blinking when i accelerate. at idle it stops blinking, but still runs rough. it also smells like rotten eggs bad.
      any help would be great

    2. 02-02-2009 06:16 PM #2
      coil packs, spark plugs, spark plug wires, mass airflow sensor. check thoose out. or get it scanned and give us the code it throws.

    3. 02-02-2009 06:55 PM #3
      just took it and had it scanned. code - P0301

    4. 02-02-2009 07:12 PM #4
      Cyl.1 Misfire Detected-P0301
      Potential cause could be spark plug, spark plug wire, and sometimes a bad ignition coil or coil pack.

    5. Member BassNotes's Avatar
      Join Date
      Mar 15th, 2005
      Costa Mesa, Calif., USA
      2002 VW GTI 1.8t
      02-02-2009 07:41 PM #5
      Most likely a bad coil pack.
      Next most likely would probably be the spark plug.
      Bob Lee
      2002 GTI 1.8t 262,000+ miles
      VCDS 15.7.3 with KEY-USB interface

    6. Member aadosx's Avatar
      Join Date
      Aug 24th, 2008
      MkIV BMP .:R32
      02-02-2009 07:50 PM #6
      Does it sound like a WRX with exhaust? Sounds like it's a bad ignition coil. Turn your car on and let it idle, get under the hood. The ignition coils collectively make up the "coil pack" and each coil is pressed or bolted onto where the spark plugs are on the top of the engine. You can unplug each coil from the wiring harness one at a time. Your car should seem like it's barely idling since it's technically only running on 3 cyl. When you unplug a good coil, the car will bog down even more. When you unplug the bad coil, you should notice no difference.
      They are under $50 from the dealership, and make sure you get the latest revision, noted by an "R" at the end of the part number. You can replace only the bad coil(s) if you wish or if you can afford it, go ahead and get the latest revision if you don't already have them.. Your call.. Or you can go ahead and get a bolt down style which some prefer, but I think is unnecessary. You can get either for a better price than the dealer at http://www.ecstuning.com
      Good luck!
      .:R32 : flickr : vimeo
      Quote Originally Posted by Redapex View Post
      The 599 GTO runs on leaded liquified platinum and the only by product of the exhaust is $100 bills... And whats that glorious sound coming from the tailpipes? Why its Kanye West telling you that your Merc is scrub status.

    7. 02-02-2009 10:03 PM #7
      Common issue, please review the FAQ's code search info and the many past threads in the forums of similar symptoms.

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