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2006 A4 Quattro. Misfires horribly when engine warms up. Changed coils yesterday. No difference.

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In your intake box there is a Ignition module, it makes different cylinders misfire, it will eventually go totally bad. its a silver peice on the bottom and pops into the top of the intake box with a black seal.

Posted on Mar 30, 2011

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Posted on Jan 02, 2017

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1998 Audi A4 Quattro, 2.8L, AHA, 75K miles, bought...


im a tech in the bronx and i dealt with the same code for the misfire. burt i realized that there wasnt any power to the coil of #2 cylinder. I replaced the sensor mounted on top of the air filter box, which solved this problem.

May 20, 2010 | Cars & Trucks

1 Answer

2006 dodge caravan, 6 cyl. relaced cole, sparkepugs and wires in oct. 2009. Engine is reading #2 cyl. misfire again. Why


Firts time swap spark plug & ignition coil between two different cylinders and read again if the same #2 cyl. misfires !
If #2 cyl. is OK and another cyl. misfires then spark plug or ignition coil is out of order and must be replaced.
If #2 cyl. misfires again then #2 injector must be checked !
If ignition coils & spark plugs (complete set for 6 cyl.) are replaced then you must check #2 injector !

Mar 15, 2010 | 2006 Dodge Caravan

1 Answer

Audi a4 2.5 tdi quattro sport, was holding back then just stopped


More than likely the fuel pump. This may sound stupid but take something and give your gas tank a bit of a thump. What year is the car?

Sep 18, 2009 | 2002 Audi A4

2 Answers

Poor performance, hesitation, sluggish and shaking


Those are cylinder misfire codes. PO300 is random misfires (meaning 1+ cylinders misfired) and the other 2 codes are for cylinder #1 and 2. Did you change the ignition coils yet on 1 and 2?

Do you let the tank go to empty before refueling a lot?

Sep 02, 2009 | 2004 Audi A4

1 Answer

Audi A4 2006 2.0 Turbo Quattro, with 13000 miles. Problem: When warmed up, check engine light comes on and a loud squeal is heard. Tapers off when gas is pressed. Power remains OK. Air control system...


Hi,
the squeal is caused by a belt,not tensioned correctly ,I would check the cambelt tension first and then the serpentine belt,if not obvious you need to take to a Audi trained garage.If you plug in a code reader it will help point you in the right direction by the fault code.

Jul 17, 2009 | 2006 Audi A4

1 Answer

Audi A4 1.8T Quattro 09/2003 Temp guage rises as


Could be thermostat this regulates the water flow around the engine to keep it cool sounds like it is sticking open when water gets hot!!

Jun 07, 2009 | 2005 Audi A3

1 Answer

Engine shakes periodically; warm or cold. Bad Coil?


the p 0300 codes gives you the clue
it is random misfires and that is predominately from injector and low fuel pressure
pulling a plug lead will amke no difference if there is no fuel in that cylinder to ignite
bad coils will be a constant miss regardless
try putting a can of quality injector cleaner in the tank to see if that fixes the problem
have a fuel pressure tset done to check for pump, filter or pressure regulator problems

May 18, 2017 | 2003 Chevrolet Silverado 1500

1 Answer

Audi A6 Misfires


You may have a coil pack going bad. They're on the front top of the engine - you'll see them if you follow the spark plug wires back. Do you have any codes from having the engine scanned? If you can get it scanned (AutoZone will do it free), post the codes up and we'll see which cylinder(s) are misfiring. From there, you can swap coilpacks around and see whether the misfires follow the packs or stay in the original cylinders. If they move, you have a bad coil pack or two. If they don't, since you've already changed plugs and wires, I'd see about having the injectors diagnosed to see if any of them are failing.

Jul 18, 2008 | 1999 Audi A6

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