Both problems are when the car is hot (>30min or more driving) 1) low rpm jerk. not sure if it's pinging, but at any speed, if my rpm is below 2k and i accelerate, it'll sometimes jerk once or twice and then resume accelerating. once it reaches 2+k rpm, it won't happen anymore. when the car is cold and perhaps the first 15min of driving, it won't do this at any rpm, any speed. 2) -drive for 15 mins, turn off, restart after any time = normal idle -drive for 30 mins, turn off, restart after 30 sec = normal idle -drive for 30 mins, turn off, restart after 10 min = idle at 500-600rpm -drive for 1 hour, turn off, restart after 10 min = idle at ~500rpm -drive for 3 hours, turn off, restart after 10 min = idle at 350-450rpm (easily stalled) at any of the above abnormal idle speed, it goes away in 1 minute of low rpm, it will slowly climb back up to normal idle. if i restart the car after a longer amount of time, like 30 min, the idle will be normal again as the engine has gone back to it's cold start routine. i DO have a check engine light CODE21: O2 sensor, which i've replaced with a brand new NTK sensor but still gives me a CEL. Not sure if the wiring is fuu'd, but i'd appreciate it if someone showed me where the O2 sensor wire leads to.
yes i did. O2 sensor problem has now been fixed. a portion of the wiring has brittled away near the exhaust manifold area and now i have no more CEL. but issues still persist
