On my Peugeot 306 1.6 1998, I have noticed that when temperatures are hot outside my engine isnt performing as well as it should do, as it runs very different when temperature is cooler, got a lot more poke to it, is this called engine pinging or something, as it sounds slightly different as well, as i am unsure, and if so is there any way to cure this problem
Any ideas?? Much appreciated