My 2007 Toyota Corolla with 1ZZ-FE engine is having issues with the engine idling while cold, as if it was having issues with a Spark plug or an ignition coil (already replaced one that was working intermittently). The thing is that the issues are only present from starting the engine until it is in working temperature. Also notice that while rough idling the break pedal is rock hard as if the brake booster was damaged which I already replaced, no vacuum hoses are broken.
Also noticed that the Check engine light doesn't light up while failing. Could this be related to the MAF sensor being dirt or damaged? intake manifold gasket?
Any help is appreciated.
Finally solved the issue, the MAF was bad, thanks to another mechanic in YouTube could nail the issue and solved it.
Try cleaning the MAF sensor and throttle body to see if that helps.
https://www.youtube.com/watch?v=NWCKvU2FmDc
Also see the troubleshooting section of the site FAQ.
@chucktobias Thank you, I'll give it a try and let you know how it went.
Hi!
I couldn't post yesterday but here is a video of how the idling goes, I cleaned the throttle body, it didn't have much carbon buildup but thought it was good to remove it, just in case. Sprayed the MAF sensor but the issue still happens while the engine is warming up. Also got a code (Check engine light is on but don't have any tool to read it at the moment).
So here is the video:
Already did the idle relearn but not much improvement.
Keeping the thread updated.
The car since it had the Check engine light, was not running well, throttle slow and transmission was holding the shifts too long. Took the car to a friend that has a scanner and had P0102 and P0113 codes, deleted the codes and everything went back to normal in that regard.
But, the issue of the idle speed shown in the video on the previous message when warming up is still happening. No codes are shown regarding that.