Hi,

I have had my ST170 ('52 plate, 85000 miles) for a few months now and have knocked up 1000+ . Very pleased with it apart from the infamous stutter.....
Is it simply a "feature" of the car or is there some underlying condition? Mine does it around the 2000 - 3000 rpm range, both on acceleration and over-run and it is quite disturbing. It does not feel like a misfire, more of a subtle fueling issue.

I have hunted high and low on the web and have not seen a satisfactory outcome - the threads just seem to fall off the cliff!

I have replaced the plugs and the air filter but the issue remains. I don't want to keep throwing money at it for no reason. Other suggestions seem to be:
* HT leads
* Coil pack
* Fuel filter
* Fuel pump

I was considering buying a code reader with live data acquisition and was wondering whether I would have any hope of understanding the data, and whether it might be able to guide me further?

Does anybody have any experience of fixing their stutter, and also of using a live data reader?

Thanks in advance,

Bert