Question about 2004 Audi S4

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Bad catalyc converter! audi s4 b6

I would like to know,if a cloged catalyc converter with the charcoal from inside the cat.is broken its all loose inside very bad,will make the car misfire only cylinder number one!!or if will make the car misfire at all? cuz audi said that they have to replace the engine because the wall where the pistons goes is scrathed,but all the valve,pistons,rings are in very good conditions i think the mechanis missjudge my car,without cheking the cat first.any idea?

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Sounds like **** to me. Did they do a compression test to determine this? Cat Converter can't cause a misfire on one cylinder. It is more likely a plug, coil, or fuel injector. Get a second opinion!

Posted on Feb 27, 2009

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A6 turbocharged. Whyu does it smoke when it covers a 120km per hour?


I am going to say 'blown turbo'. As I understand it, they needs replacing every few years. They are susceptible to heat and incredible revolutions. They have to be lubricated, the seals go, and you get smoke.

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CODE P0441..so is this a false code or...i replaced all spark plugs and now this code remains


The P0441 code indicates that there is improper purge flow in the EVAP system. There are many things to check for this code. First a loose gas cap can trigger this code, Remove gas cap and check the rubber seal on cap, put vaseline on the seal and replace back on vehicle, or replace cap if bad. A broken or loose vacuum line, and also check the purge valve in charcoal canister. Hope this steers you on the right track. God-Bless! Rotten egg smell is caused buy a bad converter-- Here are five signs that something may be wrong with your catalytic converter:
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Nov 19, 2015 | 2006 Kia Optima

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Can a diagnostic detect a bad catalyc converter?


Depends. A five gas analyser can tell the amount of NOX, CO, CO2 which will let you know based on what the values are. You can do a visual test at night if the car is running. Just look underneath. If it is glowing hot it is plugged. If you smell rotten eggs coming from the exhaust it is a good sign its bad. You can beat on it with your hand and if you hear debri inside being moved by the beating it needs replaced. A dianostic like a cheap scanner will tell you your downstream O2 sensor or bank 1 sensor 2 or bank 2 sensor 2 has a fault code but that isn't exactly going to tell you the Cat is bad. If your scanner has the ability to give you data you can see if the value is high or low depending on what the vehicle is supposed to read. If your upstream sensor 1 is reading good and your down stream sensor is reading bad there is most likely a hole between them. The sure sign of a bad Cat is lose of power, the smell of rotten eggs, its glowing under the car from heat caused by blockage, your O2 sensors are acting up or throwing codes, you can hear a leak coming from it or see one. Some Cats don't stink when they go bad because of the type of catalyst used inside. So if you know what your doing you can use a dianostic test to detect a bad catalytic converter.

May 29, 2014 | 2004 Kia Sedona

1 Answer

I'm wondering whether on my 2003 (B6) S4 4,2l V8 cylinder n. 4 is the fourth one (front to rear) on left bank or the second on the right one. This just to understand the real firing order. Thank...


Firing order for 2003 (B6) Audi S4 4,2l V8 engine is: 1 - 5 - 4 - 8 - 6 - 3 - 7 - 2
Cylinder no.# 1 is first one from right front side of the car, and cylinder no.# 4 is the fourth one (front to rear) on the right bank of cylinder block. See picture below:

tdisline_88.jpg

Dec 08, 2010 | Audi S4 Cars & Trucks

1 Answer

Why does so much heat enter my 2004 audi s4 from the transmission tunnel?


Hello,

the cause is the exhaust system and the two-way catalystic converter system of your S4.

The converters become very hot if you put the hammer down (app. 500 deg. celsius on the outside) and even though there are heatshields mounted between the converters and the vehicle´s floor, you can feel the heat inside.

The transmission itself is producing high temperatures as well, so no worries, remember your S4 is sport´s car ;)


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1 Answer

Check engine light (CEL) problem


Yes the CEL should have turned on. Just turn the key to the run position and the light should turn on.If it doesn't, the bulb may be burned out. Also, if the coil failed and was driven for awhile, it may cause the cat converter to fail after awhile of driving. So, please keep that in mind.

Jan 07, 2010 | 2002 Audi A4

1 Answer

I have an audi a4 1998 and i have been converting it to a s4


Sorry!.. The information you seek is 'PROPRIETARY'.. meaning it's a secret by the manufacturer. If you really want to fix it yourself?, then contact the manufacturer.

Sep 10, 2009 | 2002 Audi S4

1 Answer

2004 audi s4 b6


Very weird, a bad cat should not make it mis-fire, if it is just one cylinder it is mis-firing on, its worth checking the coil pack for that cylinder

Feb 21, 2009 | 2004 Audi S4

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