Hey guys my engine is acting weird these days

some times on idle the rpm whould go up and down but mostly it will go down below 1000 rpm. so my car whould shake a bit and act like its going to shut off den i whould press the gass a little bit for the rpm to go up and it whould come back to normal... wats the case on this?

After coming to a stop off a gear my rpm will dip down below 1000 rpm again and it whould come back up to normal (when im in gear and den go to neutral)

What is causing these issues?

Thanks in advance

 

Wish i could help you my car was doing the same thing now well when its hot outside it just cuts off, I have narrowed it down to a sensor or the iacv. try resetting your ecu if you havent done that already and let it sit there for about 15 mins see if it changes

 

I just found the fixed for my S a couple of weeks ago but it might be different on yours.

My fix was adjusting the throtle cable by losening it up 1 turn. It turns out, my throtle cable was too tight so the TPS (Throtle Positioning System) was reading open so the computer cuts the fuel a bit to where the car does exactly what you were describing.

Eversince I did that I have NO idle problem what so ever in any condition/situation.

Give it a try, it might work for you too. Good luck.