Why is my 2004 Mitsubishi Magna using so much fuel?
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Asked by Dean
I've just bought a 2004 AWD Magna and it goes like the clappers, but it's chewing 20 litres per 100km on the highway at 2500rpm, and more than that in city driving. I was told it was recently serviced and looks to have new oil, air filter, and new spark plugs in front. I haven't checked the rear plugs. Any idea why it's so thirsty?
Answered by CarsGuide
11 Jan 2024Perhaps part of the reason for the car's high fuel consumption is your statement that it goes like the clappers. Drive it like that and fuel consumption can spiral. That's especially so of this model which, with its all-wheel-drive, had quite a bit more driveline friction than the front-wheel-drive Magnas.
However, 20 litres per 100km on the highway suggests there's something else contributing, so an electronic scan of the car should throw up problems like a blocked catalytic converter, stretched timing chains, or a lock-up torque converter that isn't locking up. Don't forget the basics such as tyre pressures, binding brakes and even the condition of the fuel system including the pump, filter and injectors. One or more fuel injectors which are worn and prone to dribbling when they should be shut off can easily cause fuel consumption to spike.
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