hello , i could really use some advice , we have a 96 punto 1.2 75sx ,
it has started misfiring at low revs as you accelarate hard in 2nd and
3rd gear , its like a spluttering misfire , i have no injection fault
light coming on thats fine just goes out as normal , spark plugs are
3000 miles old , at high revs or when cruzing at anything over 40 mph
its ok , its just when there is a demand for power,  exhaust system is
fine no leaks from front pipe , i have put injector cleaner in fuel ,
its had fuel filter , i heard something about dodgy engine temp sensor
can cause misfire , anybody heard anything about that or coils , its
driving me crazy , just had cam belt done 1000 miles ago and it was
running lovely when it came back , just cant understand it , the car
has only done 26,000 miles , if anyone got any advice i would be
gratefull . thanks .....................mark