annbry

My 1995 140 series sc500 coupe starts OK, and after it warms up (about 3 kms) when stopped at traffic lights, it starts to miss and run rough. This gets worse and within 2kms stops completely and wont restart,
After 2 hours to cool down it starts and drives perfectly. I dont know how long for as I am happy to be able to drive it home and garage it.
At 192,000kms have replaced spark plugs, hi tension leads,dist caps and rotors, engine harness, cam angle sensor, battery.
I would appreciate any ideas as to what it may be.