[bluedog]

If ignition timing was that much wrong, you could hear and maybe feel that there was something wrong, if at all it would be possible to start the engine without problem.

Next Question to answer would be: Why should of all things it be the EPS light, which blinks? EPS has nothing to do with the engine at all, neither ignition nor any other part of the engine. Why not let just nothing blink at all or why not let all the lights blink? Why exactly and only let the EPS light blink when prepared to check ignition timing? EPS has as much to do with the engine as the headlights or the wipers or any other electrical component on the car besides ignition and alternator.

So, what sort of logics should it make probable to choose the EPS light out of all things, to indicate ignition timing problems?

Further point: I believe it was in the other topic, where you posted the results of an exhaust gas test. Besides the rpm approximately ohne third to low, that values seem normal to me. Especially you do not have to much Carbon monoxide (CO), what could be a clue to a bad air mixture or an incomplete combustion. And, still unprooven but neither proved false up to now, I gave you a much less harmful explanation for the misterious 650rpm issue.

And, last but not least, you did not mention that the engine has any problems, i.e. that it would make odd noises or not run smootly or anything else.

If the MIL doesn't blink out any error codes and the engine runs normal, and the exhaust gas composition looks normal and plausible, and the EPS (of which we do not even know if it is present) is not obviously failing (one would surely remark that, believe me), how do you come to the seemingly absolute conviction, that there must be something wrong without any doubt?

Couldn't it be the case that you are only not sure if there is everything ok with the car and you don't trust your own perception?

So, how do you come to the conviction, that there absolutely must be something wrong with that car? Any symthoms that we do not know yet?