splitfire

i havent had any issue before . one morning i started my car. i drove about 2 minutes i did overtake 1 car right after that the idle sputters. ..i drove the car without warming up engine, ambient temp was 7deg celcius i dont know if that matters. so i pulled over and turn of the engine . and started back again now the idle wont go pass 2500 rpm. so i went back home running only 30kmh coz thats the maximum speed it can go. i borrowed an OBD reader it says p2100 i looked up it has something to do with throttle control motor. i pull out the throttle body i cleaned it using throttle cleaner. i used 2000 grit sandpaper to remove dust build up on the bore and the swiveling plate of the throttle. now its clean. I installed it back. started the engine. p2100 was remove now another code appeared its p1241 possible causes ,Faulty Mass Air Flow (MAF) Sensor, Faulty Accelerator Pedal Position (APP) sensor, Faulty Engine Control Module. the Idle is fluctating consistently between 1200-1400 as the engine gets warmer the rythm is faster its like broom...brooom...broom...broom... every 1 sec interval . try to press gas peddal it has a delay and theres a power loss Rpm wont go high like it used to. Sorry guys i couldnt upload a video file size is very limited.

CamShaft

Try replacing the throttle body.

jman49127

I know this is an old thread, but I'm having a similar issue, just wondering if replacing the tb worked?

phanduc

I have similar case same as old thread.

My engine is Lancer IO 2010 2.0 Little.

I check and found that engine on.1 and no.4 not working. enigne only running no.2 and 3. even though spark plug, injector and combusion is normal.

what is problem of this car???

Thanks

jman49127

For my car replacing the throttle body did the trick and I haven't had a problem since. But what you are describing is much different, if its showing you that cylinder 1 and 4 aren't firing then you should first replace spark plugs, then do the ignition coils and hope to god that it isn't the ignition module.