My xpower 140 seems to have developed an issue.
On hard acceleration it seems to stutter / misfire between 2000 and 4000 rpm. It idles and starts fine and has just passed MOT emissions tests. It has been sitting for a couple of weeks.
Lat trip it seemed to clear itself after a good hard run. This time it hasn't.
Any ideas where to look would be welcome.
Is the engine pre-euro 2 with a dizzy? The cap contacts can be a problem but not usually the rotor arm unless it has never been changed or cleaned up.
Have the plug HT leads been checked of late? On my K series one of them had conveniently corroded to the plug causing a misfire. So much so that when trying to remove it the contact was left on the plug!
Otherwise normal checks - plugs & lambda. Or the horror of dirty fuel........
Always worth checking leads with a multimeter , a ruler and a simple formula to work out resistance over length (Search you tube)....
When I did this it revealed a lead that was out of kilter with the others.
It's 2003 so assume its an EU3?? Also what spark plugs should it have?
NGK BCPR7ES
Jonathan
A throttle position sensor reset TPS can sometimes clear faults - ign on but not running, press throttle to floor 5 times, ign off.
I also recall someone with a corroded wire on the crank sensor (rear of engine block drivers side).
Ian
I'll second water down the plug holes - if its been stood in the rain, or power washed.
Mines done it a couple of times over the last 18 yrs - always a surprise when the traction control cuts in on hard acceleration uphill from one of the junctions on my commute home . . .