2003 Mitsubishi Lancer OZ Rally - Hesitation/Surge while accelerating while engine is warm. New Filter, Plugs, Wires already done. Any ideas?

SOURCE: Loss of engine power Mitsubishi 2002 Lancer OZ Rally

Repair Manuals for the Lancer is like Hen`s teeth, however in your case look for the obvious replace the fuel filter, check the air filter also, start with the simple problems first

SOURCE: i cant find the diagnostic

It will be on Either the Right or Left Side of the Steering Column Under the Dash. Also, Some of the OBD Outlets were Under the Hood Mounted Near the Firewall. Please Rate My Response! Thanks!

SOURCE: What kind of oil does a 2002 Mitsubishi Lancer OZ Rally need?

it takes 5 quarts of sae30 weight oil use either quaker state or valvoline this is better oil and doesn't sludge up the engine

SOURCE: Mitsubishi Lancer OZ Rally 2003 hesitates while driving

before anything i had the problem and this is the way i solved it ... the lancer has 2 ignition coils in 2 cylinders what you do is take the iginition coil out of the cylinder that is misfiring and change it to another cylinder and put the car on the odb reader again it should change location of misfire .. then that would tell you that its the ignition coil thats bad i ended up getting my coil at the dealer for $110 ebay has some aftermarket pairs for $100 so you can get 2 now for the price i paid for 1 that will solve the problem guaranteed owne d a lancer for 5 years know the ups and downs to them

dirtyjerz908 at GMail.com hit me up

SOURCE: 2002 mitsubishi lancer oz rally troubleshooting

Code p0420 is 'catalyst efficiency below threshold'.

This could be caused by a bad catalytic converter but before dumping a ton of money on that I would suspect the after-cat oxygen sensor is getting lazy and setting the code.

Have the O2 sensors checked and replace if needed before suspecting the catalytic converter.

Good luck.