Folk,
This has been a problem on and off for a while now. It came on again a couple of Km after a refill at a station we don't normally go to.
The engine behaves fine under acceleration, but within a few seconds of cruise, will start to hiccup, losing power totally for half a second, and repeat that irregularly *every few seconds*. It's quite jerky - annoying almost to the point of being undriveable, and I'm also worried that it might be doing damage - pinking? If you alternate between slight acceleration and lifting the foot, it doesn't seem to happen - until you stop changing speed for ~2 secs. The acceleration response is fine, so I don't think it's the fuel filter.
I suspect that the ECU has detected cruise, and is experimenting to find how much it can lean out the mix... but is going too far. I suspect the O2 sensor. Given that this is expensive to replace, is it possible/easy to expect to *try* a replacement before committing to paying for it? Apart from just replacing it anyhow, is there any other option?
Has anyone else had this symptom or can suggest an alternate cause?
Clifford Heath.