Cylinder misfires, car shake while driving & at idle, much more..

[yeojdas]

http://youtu.be/c0msRk6X8Nk

Hello everyone, I attached a video of me explaining everything going on. I would really appreciate anything. Thank you guys.


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[john_gonzo]

Bad coil packs could cause this. DON'T replace the coil packs yet.

Are any of the six cylinders not misfiring? If so, swap that "good" coil pack to a misfiring cylinder, clear codes, run the engine, check codes again. If that previously misfiring cylinder is now code free, then the coil that used to be in that cylinder is bad. Repeat as necessary to locate bad coils.

[Daves04A4]

I had 2 of your problems with my 2004 3.0. I don't know if my solutions apply to your 2009 but here's what I found. If the 3 cylinders misfiring are 1-2-3 or 4-5-6 they are one side of the engine. If you're lucky you'll find bad wiring going to the coils on that side of the engine. In my case it was a leaking head gasket$$$$$$$.

The oil warning was much simpler. I replaced the oil level sensor which made no difference. I called the parts guy at the local Audi stealership and actually got good advice. He told me that it's a common A4 problem, and it's nowhere near the oil.
The oil sensor is on the same circuit as the hood latch sensor and that is where the problem lies. Look on the back of the hood latch (the side facing the engine) and check the wires going to the hood latch itself. I found that the insulation on these 2 wires had hardened due to heat and cracked off. Both wires were bare and shorted together. I replaced the latch (you can't buy the sensor separately) and the problem was solved.
I did notice on the new sensor that the insulator covering these two wires is about an inch short at the latch end and the two wires are only protected by their own insulation which will obviously fail again in 100,000 miles. Hope this helps someone.