My 96 2.6 v6 estate has recently started stalling at traffic lights when idling it doesnt do it all the time on average u can stop 10 times and it will stall once. It will only do it when at normal temp. the rev counter goes to 1500 even though at times it sounds as if the engine doesnt then cuts out, it will start again immeaditly. Its had plugs air filter recently and was doing it both before and after it just passed the MOT on the emmissions as well. It runs fine apart from this and last weekend hit 135mph! any ideas please?

 

fuel filter is a good start