the car runs great when driving. the problem is at stop at idle. Engine shakes and whole car shakes in non-rhytmic manner. I had some cars so far but this one is worst in terms of idling. Many people would not notice anything wrong because from outside all is ok but once you are on your seat, the feeling is not nice if you know how a v8 should idle. So in P, N and D the situation is the same, only that when in D the vibrations are sligtly more damped of course. no stalling at all! But I think that from idle to ca 2,000 rpm an educated person can feel a misfire.

Thanks for not suggesting me new engine mounts and spark plugs and rotors. because all these and much much much more was already replaced with no effect. I really think that nobody here can recall a part which was not inspected or replaced.

HOWEVER, i have some news:

I attached a picture of my timing light for ca 20 EUR I think. A also attached two typical situations for cylinder 1. I am surprised because I expected larger fluctuation of timing but I found out tha timing was more or less between 10 and 20 degrees, maybe sometimes for a short moment it was 5 degrees.

Now comes the most interesting part: I found out that

-cylinders 1 and 6 gave same picture with timing light. But i am sure the cylinders should not fire at same time. Strange ! the only conclusion is that timing light is not precise !?
-cylinders 4 and 7 gave same picture with timing light
-cylinders 3 and 5 gave same picture with timing light
-cylinder 2 and 8 did not give same picture !!!!!

for cylinder 2 the picture was not stable. The picture was not stable during observation period (several seconds) but the fluctuations lasted for short time, I assume for one turn of dampener. For cylinder 8 the picture was not stable too but fluctuations lasted much more time (ca 0.5 or 1 second) in comparison to cylinder 2.

What does all this mean?

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