Help my cars computer is messed up

[Cliopetrolhead]

So this morning when I was driving I realised my range of petrol dropping really quickly and my mpg going down to 15mpg or lower lol that's when I'm driving but once I stop at a traffic light or just stop and park it goes up back again I don't know what's wrong I'm driving a Renault megane mk2 ph1 I want this fixed what do you guys think it is?

[blueg33]

Heavy right foot

[Cliopetrolhead]

blueg33 said:

Heavy right foot

Nah bro I drive it very economically

[tonyb1968]

Could be a sensor issue, the ecu may well over fuel to run the car safe if its not getting a good reading, how much soot do you have on your exhaust (if you can see it?).

[Cliopetrolhead]

tonyb1968 said:

Could be a sensor issue, the ecu may well over fuel to run the car safe if its not getting a good reading, how much soot do you have on your exhaust (if you can see it?).

Haven't looked at the exhaust but I will in the morning I'm also thinking that my mileage is going up faster then usual aswell so I don't know what to do Isit a ecu issue or what else can it be?