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  #1  
Old 07-18-2008, 06:27 PM
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Default engine light flashing, rough idle '02 A4

02 A4, 1.8T, running great yesterday.
On the way to work this AM, engine started skipping, and check engine light started flashing.
Rough idle at traffic lights.
Just turned over 80,000 on ODO.
My initial thoughts are change the plugs, and maybe coilpacks have gone bad.
I have VAG-COM it said misfires on cylinders 1 &3.
Didn't hear the turbo at all.
I'll start with plugs, but does anyone recognize these symptoms as a computer component failure?
Wanted to ask the group for help before I chase my tail for days.
Thanks in advance for your time and interest.
  #2  
Old 07-18-2008, 08:14 PM
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Default RE: engine light flashing, rough idle '02 A4

Coilpacks
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  #3  
Old 07-18-2008, 08:30 PM
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Default RE: engine light flashing, rough idle '02 A4

definately! i had the same problem on my 02 and it was the coilpacks!!!!!
  #4  
Old 07-18-2008, 08:55 PM
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Default RE: engine light flashing, rough idle '02 A4

yep def. sounds like the coil packs. Had to get new ones from the dealership. 30 dollars a pop. from what i read that if you had the older ones they might be covered under warantee by the dealership because of a recall on them. But might want to check it out if you dont want to dish out 30 for one. mine was at 102k when mine went...
  #5  
Old 07-19-2008, 10:51 AM
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Default RE: engine light flashing, rough idle '02 A4

I keep two coil packs in my trunk I've blown through 5 in 4 years
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  #6  
Old 07-19-2008, 05:20 PM
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Default RE: engine light flashing, rough idle '02 A4

Guys -
Went to replace coilpacks, found spark plugs covered in oil.
Oil had somehow pooled around the plugs, one wasn't even visible.
So I changed all plugs and coil packs.
Got a great big cloud on the first start after removing spark plugs, oil leaked into ignition chambers I guess.
Have any of you ever had an issue with oil collecting around plugs?
What causes it, how does it happen?
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Old 07-19-2008, 09:51 PM
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Default RE: engine light flashing, rough idle '02 A4

tighten the spark plugs down really good
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  #8  
Old 07-20-2008, 03:18 AM
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Default do not tighten plugs too much

uhhh, do NOT tighten the spark plugs really tight. basically you want to tighten them a little more than fully. if they are tightened too much you can cross thread them easily, then you are fucked.
  #9  
Old 01-27-2009, 08:29 PM
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yeah don't overtighten them cuz then you are screwed big time. Sometimes the oil in the plug chambers is caused by the valve cover gasket needing to be replaced. There is a good diy forum out there for this that I have seen.
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  #10  
Old 01-28-2009, 07:29 PM
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Coil Pack!! since I have did the APR stage I, I have been going thought these coils every 7 months.


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  #11  
Old 01-29-2009, 11:16 AM
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the oil problem is most likely caused by a leaking valve cover gasket. Start with that its cheap enough.
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Old 01-29-2009, 01:30 PM
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get the hitachi e coils if u get the bremi coils from the dealer this problem will reoccur. I have had hitachi coils stage 1 in my car for almost a year with no problem.
  #13  
Old 01-30-2009, 07:28 AM
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I have an 01 1.8t having the exact same symptoms except there was also an odd smell associated with the flashing check engine light.

I have not checked the plugs yet for oil but they were just replaced over the summer about 6k ago. One note when changing the plugs I noticed one of them was burnt but at the time had no problems with the car.

Thanks in advance!
  #14  
Old 01-30-2009, 01:04 PM
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Tighten down the sparkplugs? The proper torque to apply to the spark-plugs is 30newton meters or roughly 23ft-lbs, not more or less. There are too many reasons to list why not to over-torque your plugs. Google it.

The coil-pack(s) on tke1now's car most likely failed because the pool of oil that surrounds his coilpack(s) and spark-plug(s) is conductive and shorted out the coil(s). The reason that the oil is pooling up around said components, as vdubstreets states, is due to the valve-cover gasket failing.

tke1now, the oil that most likely caused your coil-pack(s) to fail, unaddressed will ultimately cause your new coil-pack(s) to fail as well. It all depends on the severity of your oil-leak. Plugs were probably fine but it never hurts to change them (you got copper plugs, right?) and you could have tried cleaning the coils with some electronics cleaner or wash and giving it a shot when there is no short but if they've never been changed before their days were numbered.
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Last edited by krystallbluea4; 01-30-2009 at 01:10 PM.
  #15  
Old 01-14-2010, 04:37 PM
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Default Another rough idle question

Sorry to bring up this subject again, but I have the same symptoms(rough idle from idle to around 2200 rpm, engine light flashing). However, when I am on the highway from 2500 rpm and up, the engine seems fine and the CEL goes off. After reading this thread, I decided to check the coilpacks and plugs. The no 1 and 2 cylinders had oil on the plugs. However, after cleaning them, I wanted to test the coilpacks individually so I removed the plugs one at a time and put them back in the coilpacks and started the engine while grounding out the plug. one by one, all the plugs seemed to be firing. My question is, if a coilpack is defective, would its plug not fire at all? Also, there is a ticking sound that seems to be coming from the passenger side of the engine, almost as if something was shorting out, almost like a bad spark plug wire on an older engine. I can change the plugs and packs, but could it be a bad injector? As I stated before, the car runs fine over 2500 rpm. Any comments?
  #16  
Old 02-21-2010, 02:10 PM
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Quote:
Originally Posted by pa4ul View Post
get the hitachi e coils if u get the bremi coils from the dealer this problem will reoccur. I have had hitachi coils stage 1 in my car for almost a year with no problem.
Hi - where do you get the Hitachi coils (if not from the dealer).
Is this a DIY job?
Any details about the valve cover gasket?

thanks!
  #17  
Old 02-22-2010, 12:05 PM
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hitachis can be purchased from ecstuning.com Fairly cheap and easy to install on your own. Should only bee 10 to 20 minutes to take off the old ones and pop in the new ones. Valve cover gasket can be found here. http://www.a4mods.com/ With alot of other little things u can do to your car.
Old 02-22-2010, 12:05 PM
 
 
 
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18t, 2008, a4, a6, audi, b6, change, check, engine, flashing, idle, light, oil, rogh, rough


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