Hi everyone!
I have a 2012 Honda Civic Si, Manual Transmission, with 232k miles on it. I having an issue with engine surging/ hunting when shifting to neutral. When i come to a stop, i shift into neutral, the rpms will drop but then bounce back to 1500 rpm and continues to bounce up and down until it settles to a normal idle. If im rolling down a hill in neutral, the idle surge will continue until i come to a stop. This happens throughout the entire drive and this doesn't happen every time i drive though. Some times it happens and sometime it doesn't. It'll happen if the engine is either warm or hot, in cold or warm weather. Any help on this would be greatly appreciated!
First of all, you should not be putting the transmission in neutral at stops or going down hills.
Other than that you may want to try cleaning your MAF sensor and throttle body.
Okay, I'll try it out. Would I have to do the relearning process for the throttle body or should I be okay with driving it for a few days?
Relearning procedure should not be required just for a cleaning. Oh, and I missed that you have a manual transmission so of course you'd want to be in neutral coming to a stop, but not going down hills.
Relearning procedure should not be required just for a cleaning.
Thanks for the help Chuck, ill try it out and hopefully it works.
Let us know how you make out, and like I said ignore what I said about not going into neutral when you stop, that applies to automatic transmissions. (You don't want to ride the clutch and prematurely wear out the throwout bearing.)
Update: Last Friday I cleaned out my MAF and TB and I'm still experiencing the same issue as before. I tried to relearn my TB as well but I couldn't keep the RPM's at 3000 until the radiator fans kicked on.. Is there anything else i can try or check out?
It sounds to me like you're probably at the point where you really need to be capturing and analyzing live data to see what's going on.