My mitsubishi lancer (carby) 1998 has a high fuel consumption and i have change oil and plugs clean up the carburetor and its the same result

could be that particular cylinder isn't burning fuel as well as the others, may have lower compression, if you have no running problems or using oil or poor fuel consumption then for a car of that age it is quite normal

Have a dealer check you computer. That controls the fuel regulation

1. Check if the ECU is throwing any error codes.

Could be
2. O2 sensor(s) or/and clogged Cat converter
3. Dirty air cleaner
4. leaking injectors
5. Worn or broken rings: check the wet and dry compression.
Might even be the ECU itself, running in "limp" mode because of a partial board failure.

If you have serviced the engine, changed oil and oil filter and air filter and spark plugs and cleaned the carburettor or cleaned your throttle body and injectors, and its still heavy on fuel then try the following. Adjust the carburettor air and fuel. Take off the distributor cap and clean the rotor and spark pionts in the cap of carbon build up by means of light sand paper. Same applies to the spark/ high tension leads and coil lead metal connection points. Check distributor timing as well. If the engine smokes, do a compression test. If results are beneath factory specifications, remove cylinder head, replace the valve stem seals and re-seat the valves and or replace the pistons and piston rings. Basically engine overhall

@Cyril.. Try to adjust your cable wire in your trotle then set it up @ 900 rpm.. Well that what i did to my 2004 lancer oz.2.0L it works

how many miles on it and when was the last tune up

Look to see if the gasket is leaking above the spark plug.

the factory mileage for fuel should be 7.2 litres per 100km but the fuel consumption will change as the car gets older so its only normal but you could improve on your fuel consumption by tuning the car

hope this helps XD

Tune up, Change oil, Wires, plugs,PCV, Air filter

the lancer get's about 23-26 miles per gallon it is a low maintenance vehicle and as long as you change the oil and do regular maintenance on it the vehicl will last a long time... please rate this