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    Thread: flashing check engine light..

    1. Member vdub_shawty's Avatar
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      11-18-2008 09:09 PM #1
      hey so i need some advice, tips, help, etc.. *2005.5 2.5L jetta, auto*

      so i was driving home from work tonight, i was in tiptronic, then switched it back to normal auto. i was coming to a light and needed to stop as i did i feel my car jerking very heavily at idle, check engine light flashing on and off on and off continuously, and a very very very low deep bad grumble. i could accelerate and drive the car but it had a very bad, almost like an older motorcycle at idle. i was on my road to go home so i wanted to try and make it home before not being able to move. it was like this for a good 3 mins or so.. still trying to drive home, then the light just stopped and sounded normal. any ideas what this could be, it scared me ****less, i thought maybe the hose on the intake or something came off but everything looks normal.

      i called a friend and he said when i got hom let it sit, try starting it and take it around the block and see if its ok... i did that and it seemed fine, sped up fast and no issues, just find it weird and wanna know what it could be.

      any ideas, thoughts, input, anything would be great. TIA!


    2. 11-18-2008 09:29 PM #2
      your car was misfiring, next time pull over and shut off your car right away to avoid damagin the motor

      as far as why this happened i would get the car scanned at your local autozone and go from there


    3. Member dekoone505's Avatar
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      11-18-2008 09:43 PM #3
      Quote, originally posted by amelparcic »
      your car was misfiring, next time pull over and shut off your car right away to avoid damagin the motor


    4. 11-18-2008 09:45 PM #4
      Quote, originally posted by dekoone505 »


    5. 11-18-2008 09:46 PM #5
      I couldn't think of anything better to say because im tryin to multitask(which isn't workin )

    6. Member dekoone505's Avatar
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      11-18-2008 09:58 PM #6
      im not making fun of that guy... im just... well, Jenn knows what i mean...

    7. 11-18-2008 10:00 PM #7
      Quote, originally posted by dekoone505 »
      im not making fun of that guy... im just... well, Jenn knows what i mean...

      I feel left out


    8. Member vdub_shawty's Avatar
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      11-18-2008 10:06 PM #8
      Quote, originally posted by amelparcic »

      I feel left out

      dont... he is just being rude about me not having a "real" car.. call him for advice and he helps then he is rude..

      but thank you for your thought on this.. i was seriously freaking out and shaking i didnt know what to do..

      all i thought was crap, no more warranty..


      Modified by vdub_shawty at 9:07 PM 11-18-2008


    9. 11-18-2008 10:09 PM #9
      Quote, originally posted by vdub_shawty »
      dont... he is just being rude about me not having a "real" car.. call him for advice and he helps then he is rude..

      but thank you for your thought on this.. i was seriously freaking out and shaking i didnt know what to do..

      all i thought was crap, no more warranty..


      Modified by vdub_shawty at 9:07 PM 11-18-2008

      don't worry about it, it could be something simple as bad gas or cheap like coil pack(s)


    10. Member dekoone505's Avatar
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      11-18-2008 11:11 PM #10
      i wasnt being rude at all. I just thought it was funny since it was the SAME thing i told u and u said, "i dont wanna pull over and shut off my car" u KNOW im never mean.. ha!

    11. Senior Member JettaGT8V80's Avatar
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      11-18-2008 11:46 PM #11
      i would put my money on a blown coil


    12. Member crazywayne311's Avatar
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      11-18-2008 11:55 PM #12
      im not too familiar with 2.5's...but it sounds like a misfire
      Current: 2013.5 FSM GLI

      Previous: 09 DBP CC, 93 Cabby, 07 DBP GLI, 91 TR GTI 16V, 05 PG GLI....

      Quote Originally Posted by patrikman View Post
      Don't **** with Wayne. He is crazy and likes 311.

    13. 11-19-2008 07:53 AM #13
      all a gasoline engine needs to run properly is spark, fuel, air and timing.

      assuming your timing chain is intact (which it is if the car runs at all), and its NA, so you can rule air out, its most likely spark (coilpack likely candidate) or some fuel issue. get it scanned, that should reveal the problem.


    14. Member XM_Rocks's Avatar
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      11-19-2008 08:33 AM #14
      Flashing CEL = Pull over and shut off the car

      Solid CEL = Check the code when you get a chance


    15. Member RINGSROC's Avatar
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      11-19-2008 08:57 AM #15
      Don't you have friends with VAG Jenn?

      Is it better now?

      "It is my observation.... that too many people are spending money they don't have, or haven't earned yet,
      to buy things they don't need, to impress people they don't like."

    16. 11-19-2008 09:01 AM #16
      Quote, originally posted by JettaGT8V80 »
      i would put my money on a blown coil


    17. Member classicjetta's Avatar
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      11-19-2008 09:02 AM #17
      I'm thinking it may actually be something related to the secondary air injection. Bad spark wouldn't cause the grumbling noises so described, the car would just stumble and shake.

    18. Member vdub_shawty's Avatar
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      11-19-2008 09:12 AM #18
      well i didnt want to pull over last night bc i was on a busy street and couldnt.. and i was almost home so thats why i didnt stop last night.

      but on the way to work it did it again. i pulled over, shut it off, let it sit and started and same thing. i couldnt be late to work and my shop wasnt open yet so i will take it there after work tonight.

      it was a shaking, stumbling, grumbling, idle heavy, and sounded like a really bad motorcycle/subaru.. im still shaking and nervous b/c i dont know what it is and i dont want to ruin anything. but i called another friend this morning he said to disconnect the battery let the ecu reset and it will clear it out a lil then get it checked out... also said it was probably a coil pack.

      but also said that i am not hurting the engine by driving on it to work.. but that it would just ruin really rough and that it is. im just scared/nervous/freaking out.. b/c ive never had this happen and cant do anything at the moment to help it..

      thanks for the responses though..


    19. 11-19-2008 09:17 AM #19
      Quote, originally posted by vdub_shawty »

      but also said that i am not hurting the engine by driving on it to work.. but that it would just ruin really rough and that it is.

      No. Flashing CEL means turn off motor immediately damage can occur. Constant CEL means the problem isn't serious and you can keep driving it.


    20. 11-19-2008 09:20 AM #20
      well as everyone has noted, if its flashing turn it off...the main reason in this case is if its misfiring it will eat up your cat. With the amount of driving you have done with it misfiring I would for sure be checking it, its amazing how fast they get ate up.

    21. Member vdub_shawty's Avatar
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      11-19-2008 09:21 AM #21
      Quote, originally posted by bcze1 »

      No. Flashing CEL means turn off motor immediately damage can occur. Constant CEL means the problem isn't serious and you can keep driving it.

      its doing both.. it goes back and forth between flashing and a constant. i shut it off but it still does it.. i cant get into the shop until after work. idk who is right and who is wrong and its scaring me to drive now idk what to do.

    22. 11-19-2008 09:32 AM #22
      I would stop driving it, or if I was to drive it I would make sure its a short distance, like I said if everyone is correct in thinking its a Misfire it will burn your cat converter up, if it melts shut you will strand yourself. If everyone is wrong about that, the fact its flashing still means turn it off right then and there.

    23. Member vdub_shawty's Avatar
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      11-19-2008 09:34 AM #23
      Quote, originally posted by dmxsoulja3 »
      I would stop driving it, or if I was to drive it I would make sure its a short distance, like I said if everyone is correct in thinking its a Misfire it will burn your cat converter up, if it melts shut you will strand yourself. If everyone is wrong about that, the fact its flashing still means turn it off right then and there.
      to work from my house is like 15+ miles.. with traffic in the morning and evening so it takes a good 30 mins. the vw shop is 10+ mins from my house but still the same route. i will disconnect the battery during lunch if i can... but i have to drive it to the shop tonight.

    24. 11-19-2008 09:38 AM #24
      Take it slow, and if it starts flashing, shut it down, and wait. If its a coil alot of times they flare up the worst when they get hot, I do spec miata racing and the 00+ coils fail all the time, sometimes to get the car going we shoot cold compressed air on them so if your in the cool night air and take it slow and shut it off along the way you will be fine...but don't drive it when its misfiring, like I said you will burn your cat up among other things.

    25. Member vdub_shawty's Avatar
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      11-19-2008 09:40 AM #25
      ok thanks.. i was taking it very slow driving in this morning.. but i will pull over and stop 2-4 times on the way to the shop tonight.

      i appreciate you talking me through this, never happened to me before and just freaking out. thank you though.


    26. 11-19-2008 09:44 AM #26
      no problem, like I said we are shooting in the dark that its a coil problem, but ur symptoms definitely make me think misfire. If it ends up being your coil, make sure you change your plugs as they are likely fouled, and definitely inspect the cat, I'm new to the MK5 so I'm not sure how difficult it is to see but someone should be able to use a scope at the very least and look in there with the exhaust disconnected.

    27. Member vdub_shawty's Avatar
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      11-19-2008 09:47 AM #27
      ok... i will let the shop look at it tongiht. i have vag com but not the cord to scan it myself but they said they would run it and see what is wrong. i will probably leave my car there and let them really look at it for the next day, ill post up what they say is wrong.

      do i need to disconnect the battery and let it reflash the ecu? or just drive it to the shop tonight?


    28. 11-19-2008 10:08 AM #28
      Quote, originally posted by vdub_shawty »

      do i need to disconnect the battery and let it reflash the ecu? or just drive it to the shop tonight?

      Just drive it to the shop, disconnecting the battery will clear the codes and they won't be able to tell you why your light was flashing in the first place


    29. 11-19-2008 10:18 AM #29
      Quote, originally posted by amelparcic »

      Just drive it to the shop, disconnecting the battery will clear the codes and they won't be able to tell you why your light was flashing in the first place

      Dead on


    30. Member vdub_shawty's Avatar
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      11-19-2008 10:19 AM #30
      ok thanks guys.. anyone have any anxiety pills that i can have to calm me down now??

    31. Member crazywayne311's Avatar
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      11-19-2008 10:28 AM #31
      dont you have AAA? or someone who can drop you off at work? i mean hell, who do you work for? sounds like you could get shot in the face and you'd still have to be on time
      Current: 2013.5 FSM GLI

      Previous: 09 DBP CC, 93 Cabby, 07 DBP GLI, 91 TR GTI 16V, 05 PG GLI....

      Quote Originally Posted by patrikman View Post
      Don't **** with Wayne. He is crazy and likes 311.

    32. Member vdub_shawty's Avatar
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      11-19-2008 10:33 AM #32
      Quote, originally posted by crazywayne311 »
      dont you have AAA? or someone who can drop you off at work? i mean hell, who do you work for? sounds like you could get shot in the face and you'd still have to be on time
      yes but it went away last night so i thought it was ok to drive and get it checked out tonight. i work with apple.. still new so we cant really be late when we first start.
      idk what we have, but i will try what was said below and get it fixed. sorry for the early call but i was freakin out.

    33. 11-19-2008 10:45 AM #33
      Quote, originally posted by JettaGT8V80 »
      i would put my money on a blown coil

      x2

      1 dead cylinder will really screw up your day and cause the CEL to flash as you drive..

      those are only like $40 and super easy to fix too

      Ryan Gravelle
      club.broke.status : flickr

    34. 11-19-2008 10:57 AM #34
      Yes sounds like coilpack. Happened on my 2002 Passat 1.8T.

      It sounded horrible and car shakes like Hulk got hold of it.... LOL

      DUB'N IN THE DOT

    35. 11-19-2008 11:21 AM #35
      Quote, originally posted by natskiboy »
      Yes sounds like coilpack. Happened on my 2002 Passat 1.8T.

      It sounded horrible and car shakes like Hulk got hold of it.... LOL

      I agree...This happened in the my wife's MKIV....Flashing CEL, running like crap...I pulled over and had it towed....Ended up being coilpack. Honestly, VAGcom = best investment you can make in your car


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