Re: Yet another Motor System Control Failure ....Help!
The latest symptoms you describe (accelerate hard, miss a beat) sound like the symptoms I had on the JTS - an intermittent coil failure.
My solution - get a diagnostic programme for my laptop, read the codes myself, swap the coils to see that the misfire moved from one cylinder to another, buy a new coil and fit it myself (five minute job).
12000 miles later, and no MCSF warnings.
You really need to find out what the error codes are that are triggering the MCSF.
(oh yes... welcome to the Forum)