Radical_Ralliart
Member
So i’ve had this issue since i bought my 2.4L lancer since november of 2022 so i thought i’d ask about it now. If anyone else has experienced this please let me know what you did to fix it
So the issue is that when the engine is at operating temp, and at idle it randomly will fluctuate, drops to 200-300 rpm and jumps back up to 700-800rpm. It does this over and over for usually anywhere between 2-5 minutes at a time.
It will sometimes stall the engine out, but i can start the engine again just fine.
I went to a mechanic to have the ecu scanned with the engine running and driving, but every sensor showed normal signs, except idle speed that was fluctuating while at idle.
Bear in mind i’ve replaced alot of parts around the engine. Heres a list of what i’ve replaced
-alternator
-all 4 coilpacks
-all 4 sparkplugs
-sparkplug seals/valve cover gasket
-battery
-oil pressure sensor
-maf sensor
-thermostat
-map sensor
-front oxygen sensor
So the issue is that when the engine is at operating temp, and at idle it randomly will fluctuate, drops to 200-300 rpm and jumps back up to 700-800rpm. It does this over and over for usually anywhere between 2-5 minutes at a time.
It will sometimes stall the engine out, but i can start the engine again just fine.
I went to a mechanic to have the ecu scanned with the engine running and driving, but every sensor showed normal signs, except idle speed that was fluctuating while at idle.
Bear in mind i’ve replaced alot of parts around the engine. Heres a list of what i’ve replaced
-alternator
-all 4 coilpacks
-all 4 sparkplugs
-sparkplug seals/valve cover gasket
-battery
-oil pressure sensor
-maf sensor
-thermostat
-map sensor
-front oxygen sensor