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Audi A4 Maintenance and Repair

2132 messages,  Last post on Nov 21, 2009 at 9:57 PM

You are in the Audi A4 Forum. Your Hosts are pat & karens

What is this discussion about? Audi A4, Convertible, Sedan, Wagon


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#2025 of 2132
slowing repair rip offs by ghstudio
Jul 14, 2009 (6:29 am)
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If you really want to shake up the service manager, ask to see the parts they took out of your car....for example, show me the flywheel you replaced. You might ask him before they do the work so he can't say...oh, we can't find it we threw it out. It's likely that that flywheel was not replaced....or that the old flywheel was just fine.
#2026 of 2132
help with common oil leak diagnosis by quickshifter2
Jul 15, 2009 (5:05 pm)
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I have a 98 a4 quattro 2.8 v6 and since the last oil change, at which point i had the engine flushed to get rid of all the sludge and deposits, there is an oil drip/leak somewhere on the back side of the drivers side of the motor, it appears to be leaking from/onto the flange that connects the manifold to the exhaust downpipe/intermediate pipe. It only does it when the motor is running at or above 2k rpms or has been driving, even if it's a short distance. The timing belt and valve cover gaskets have been replaced within the last 2k miles. Any help or insight would be greatly appreciated seeing as i cannot afford to have a dealer spend hours tracing a leak.
#2027 of 2132
exhaust damage due to overfilling crankcase by quickshifter2
Jul 15, 2009 (5:08 pm)
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my 98 a4 quattro 2.8 5-speed recently developed an oil leak/burn after it's last oil change and i noticed that the oil fill cap has a warning stating that you could damage the catalytic converter by overfilling the crankcase, how is this possible? and could that be related to the oil burning off of my exhaust flange behind the driver's side of the motor?
#2028 of 2132
Re: exhaust damage due to overfilling crankcase [quickshifter2] by vwdawg
Jul 16, 2009 (6:47 am)
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Replying to: quickshifter2 (Jul 15, 2009 5:08 pm)

Hi qs2: It would seem to me that having too much oil in the crankcase would not be related to the oil leak. My '97 A4 2.8 recently developed a very small oil leak, and it looks like it's due to a deteriorated valve cover gasket. This would not be unusual for a 10-12 year old vehicle, so I would suggest that as an initial inspection point, and although I haven't replaced my gasket yet, I would think it would not be a difficult DIY repair. As far as the "overfilling" issue is concerned, YES, it is possible to damage your converter, and they AIN'T cheap to replace ($700-900 unless you do it yourself). Did you check your oil level? If it is higher than the "full" level, you should drain the necessary amount from the pan immediately.
Good luck. audiphile1
#2029 of 2132
Engine Trouble by gregaudia4
Jul 16, 2009 (11:57 am)
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I have a 2003 A4 3.0 Q with 98K miles. I went and put fuel in the car today and then about an hour later I was coming back home stopped at a light, all of a sudden the car started shaking and the check engine light started flashing. Got the car back to the house, popped the hood and noticed that the engine is shaking more that usual. Drove the car around the area, acceleration is now a little sluggish. Kinda putters a bit before feeling normal again. The tach still rests at normal idle position. Do I have a serious problem or could it be just bad gas?
#2030 of 2132
Re: Engine Trouble [gregaudia4] by rowlandj
Jul 16, 2009 (1:08 pm)
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Replying to: gregaudia4 (Jul 16, 2009 11:57 am)

Sounds like classic coil pack failure. If you can pull the codes it will tell you which one's are shot. At this point you may do well just to replace them all should one or more turn up bad on the codes.
#2031 of 2132
Re: Engine Trouble [rowlandj] by gregaudia4
Jul 16, 2009 (1:24 pm)
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Replying to: rowlandj (Jul 16, 2009 1:08 pm)

What is the coil pack? Where is it located? How much would it cost to replace?
#2032 of 2132
Re: Engine Trouble [gregaudia4] by rowlandj
Jul 16, 2009 (2:47 pm)
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Replying to: gregaudia4 (Jul 16, 2009 1:24 pm)

They are on top of the spark plugs. Not sure about cost but figure about $30 to $40 each....
#2033 of 2132
Re: Engine Trouble [rowlandj] by gregaudia4
Jul 16, 2009 (3:05 pm)
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Replying to: rowlandj (Jul 16, 2009 2:47 pm)

I just got back from Auto Zone and had them pull the codes from the computer. I got code P0441 VAP system incorrect purge flow, blocked vapor canister. Probable Causes Faulty vent solenoid, Faulty purge solenoid, Faulty fuel tank pressure sensor. P0421 Warm up catalyst efficiency below threshold- bank 1, Air leak before cat converter. Probable causes, Rich Air/Fuel ratio, Faulty Cat Converter.
 
I looked in the Audi manual as well and it says that if the check engine light comes on and starts blinking the way it is now that it's a faulty cat converter. Also the person that checked the computer said that cylinders 2 and 5 are misfiring.
#2034 of 2132
Re: Engine Trouble [gregaudia4] by rowlandj
Jul 17, 2009 (3:37 am)
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Replying to: gregaudia4 (Jul 16, 2009 3:05 pm)

Based on what you have indicated there are two issues. One is the vapor canister system and the other is running rich and catalytic converter related issues.
 
Engine mis-fires and bad spark plugs/coil packs will basically send raw gasoline into the exhaust and ultimately damage the converter. I believe that if you fix the mis-fire issues that should help in that regard. A good run at full operating temperatures will also help once you fix that issue. You should not drive the vehicle until this is resolved that is why the engine light is blinking and not just remaining on.
 
If you fix the mis-fire issues the blinking light should go off but you may still have a solid check engine light due to the evaporator issue. That fix may be made after the fact but if you want to save expensive repairs to the catalytic converter you should fix that mis-fire matter immediately.

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