Our Peugeot 306 1.4l petrol, 1998 version has just started (as in today) idling quite lumpy once started - such that you feel it's going to stall (or at least, can imagine that it might).
It's just passed 120,000, so is getting longer in the tooth. Had it's MOT done last October and passed emmisions fine. Engine wise it's been okay. Slight oil leakage from the head gasket area (front left side) pretty much the entire time we've had it (6 years) - but not enough to cause us to have to top up much between oil changes, some tapping from the cam shaft (again, pretty much the whole time). No issues though with the running of the engine, starts immediately first time every time. Coolant has been okay-ish. No noticable mayo - but the coolant has always looked a bit rusty between changes, and is probably due for a change.
Plugs were changed last year, and we do about 10,000 miles per year. Oil change done about 6k miles ago. Earth strap replaced a year or so ago when it failed (causing weird electrical issues) - but haven't checked this time.
One other thing, which I wonder may be related, is that recently (last couple of weeks) the trip counter has been resetting on its own. I reset it each time I fill the tank and so noticed when, after half a tank of fuel has been used, it's suddenly reading only a couple of miles.
Just now, when the car was very lumpy, it seemed that whenever we pulled away from a junction, particuarly when changing up gears, it seemed to reset - we saw this happen a few times. Since then though, we've done about 15 miles without it resetting, even though we've had to stop the engine for a bit, and when re-started it was lumpy again. Might be a red-herring - but might be helpful. I'm wondering if it's an electrical problem (coil pack?) causing the trip counter to reset - which may also affect the ignition - but I've got no real idea of *why* it might cause it! Just a wild hypothesis.
There's no engine lights or anything else showing.
Any suggestions?
Thanks
David