Car appears to only be running on 3 cylinders, went to change the plugs today and one of the plugs is completely covered in oil. The car has covered 89000 miles with fsh. Im guessing its the piston ring but am praying it could be a less expensive fix. hope someone can help. Regards Paul Maitland
It sounds like a ring or value seal issue. Two things may help the old girl out. One, put in a 60% mix of Lucas oil treatment with new oil and filter. Two, buy a non-fouling tip for the bad plug spot. These let the plug fire but keep oil off the tip. Hope this is of some help to you! Neither of these will totally fix the problem as such, but will save you tons of money, that you may not wish to spend on it.I have a motor with 168.000 on it and the Lucas has stopped all oil burning between changes! John
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check all plugs and check to see if there oil in any of the cylinders if your valve covers have not been replaced there could be oil in there and ruin the plug first try changing all plugs i recommend ngk's plat or iridium if it returns you need find witch cyl or if its 3 or more couls be coil packs or icms located on top of the air box if you have 2.7T
Robert your going have to check the oil pressure the oil pumps on these engines tend to let go. What happens the key way that drives the gear strips and at low rpms it doesn't pump oil to the top of the motor but when you rev it the gear spins a little faster that's why it makes less noise you will have to replace the oil pump. As for the missing the hydrolic lifters are no working properly because of the low oil pressure.
My 2001 Daewoo Laganza also showed this problem. It turned out that my valve cover gasket was not seated properly and oil was accumulating around the spark plug of the #3 cylinder. Replaced gasket and engine started running fine.
is the plug lead ok if it is you may have a ring problem in the engine,does the car use oil if so its starting to look like worn engine even though it should be fine with that mileage,when you put in a new plug does it come good for a while?
it is always a good idea to stay with o.e.m parts and yes there is updated parts in the newer coils. and yes the M.A.F will also cause misfire faults but will not make check engine light flash or make car shake and shudder. also check you wire harness going to your coils make sure your ground wires are not cracked. That could be the main culprate. good luck hope this helps
P0306 is a misfire on cylinder number 6. The fact that you have oil on those plugs may or may not be causing it. The oil on the plugs is because of a leaking "internal" valve cover gasket. First thing I'd do is change the valve cover gaskets. Audi will murder you if you want them to do it (I've heard of people quoted $700 or more for this job). It's VERY easy to do. You can order the gaskets from www.ecstuning.com or www.purems.com for about $25 per side. I'd change them for sure, as they're a known issue on these cars.
Now, if your new plugs and changing the gaskets (and cleaning up of course) doesn't fix the misfire, you need to swap coil packs around and see where the code goes. The coil packs are the three parallel items on the top front center of the engine under the beauty cover. Trace the #6 wire back to see which coil pack it goes to. Then swap that pack with another pack, clear the codes, and fire up the car. See if the check engine light comes back and if so, scan the car to see what codes come up. If you still get P0306, then the failure didn't move, and the coil pack is not the issue (in your case, it's likely to be the wire, since you have new plugs and swapping coils didn't work). If the misfire moved to a different cylinder (one which is now hooked up to the coil pack that was originally firing the #6 cylinder) then that coil pack is bad and must be replaced (another known issue on the A4).