Last Sunday, after an engine & grarbox oil change and a good wash my engine started misfiring.
The best way I can describe it is that it sounds like a Flat 4 subaru!
The strange thing is that the misfire did not start immediately but a few minutes after the ebgine wasworking OK, and it got progressively worse up to the point I had to park the car or risk damage.
I tested cylinders 4, 5 & 6 (pulled the plugs from the ingition coils, one at a time!) and it worsened, especially with 4 & 5, so the problem seem to be mainly with the inner bank.
(don't we all love the design that requires dismantling all intake tract to access cylinders 1 2 & 3?
Next, out comes intale plenum and all coil packs.
I was expecting a blown ignition coil, but what I found was some water in spark plug wells 3 & 6 (less).
So, OK this would explain the misfire, but how to dry and clean the wells of the sludge without pushing it in the cylinders?
I guess, compressed air, with the spark plun in place, would do it, but I don't have a compressor.
And last, how can the ignition coils be tested? Ohmmeter shows 1Ohm between pins 1 & 3, but nothing else.
And a tip: EZbleed kit (for brakes), a thich tube (from fist tank shop) and warming up the oil make for easy filling the grearbox