KA24DE Idle Problems When Warm

[DenkiMan!]

i was about to post this in small questions but after research, and lack of answers i was finding, i thought it'd be best to just make a thread.

ok im having a problem with my 95 ka24de. its having issues with idle and acceleration. when its idling, it with fluctuate like crazy and bog down alot, usually to the point of dying, so most of the time i have to keep blipping the gas pedal to keep it alive when im at a light or something. and during acceleration, it will struggle to get up to speed and the rpms will keep fluctuating, and it seems like it will do this throughout powerband, and its especially worse during WOT.

heres the catch - it only does this when its warm. when its either cold out, or im driving the car for the first time in the day, it will drive and idle perfectly. now i was told it was the coolant temp sensor and i replaced both that and the connector and it still did it when it got warm after a test drive. i also do know that my ecu is throwing knock sensor and o2 codes. and it might be throwing an egr code but im not sure yet. (my ka's all effed up i know)

but my thinking is it couldnt be those sensors...or a ground...causing that because this problem only occurs when its warm. plugs are about 2 years old and i did the whole cap and rotor tune up about a year and a half ago. i also havent thoroughly checked for a vaccum leak, but once again, if it were any of those things, it'd be doing it all the time right? not only when its warm. wouldnt that make sense? can i get some help or suggestions? thanks

[Arsenal240sx]

If your O2 sensors are old and beat you should replace them as regular maintenance. Also check out your coolant temp sensor. How do your plugs look? Are they covered in black soot or smell like gas?

[da man]

do u have stock exhaust if so could be bad cat

[DenkiMan!]

alright so here are pics of the plugs, left to right, they're from cylinders 1,2,3,4. they didnt really smell that strong of gas or oil to me. these plugs are about 2 years old now so maybe i should invest in some new ones? although like i said im not sure if this would be the problem if the car starts getting weird when its warmed up.







also i found out this past summer my cat is completely hollowed out lol. i guess i should look into replacing some sensors
and i compression tested the motor, 180-190-165-180, ive known cylinder 3 has always had slightly lower compression

any other help is greatly appreciated

[Alamo_City_210]

Have you checked the gap on the plugs. I've read, over time the gap opens/closes or vice versa. Can't remember

[DenkiMan!]

no i havent, ill try that later today

[Arsenal240sx]

Looks like youre running lean. Your spark plugs shouldnt be that white/ashy looking.