Ok so whats going on here then, my girlfriend has just called me saying the revs are dropping when she accelerates and the car stalls. She was sitting in traffic and when she came to move she pushed the clutch in, pressed the accelerator and the revs dropped and the car stalled. Just a brief history for you, about three weeks ago i changed the cambelt, exhaust and ive also had a problem with a leaky heater matrix. The engine isnt overheating so that doesn appear to be the cause. The oil and coolant dont have any indication of contamination from each other either. No sign of any leaks.

oh its a punto 1.1 55sx 1995 Mreg 87k