07-4dr Code P0505 and exhaust leak in engine bay - goes into cabin and engine stutter

[Lafiro]

So without anyone's input so far, I took it upon myself to clean the MAF and throttle body.

Let me say that the MAF cleaned nicely as shown in online videos such as for the Corolla.

The throttle body, this was interesting....
Upon pressing the gas pedal, it would move slowly, jolting each movement. Pressing the pedal to the floor didn't make it go any faster and actually took a few seconds to get butterfly to fully open each time.
Used the TB cleaner and also used Q-tips and after a few seconds of cleaning, the butterfly was opening and closing better and smoother with each session of cleaning. What a difference!

The car now longer stutters and stays at slightly higher RPM even in gear, even with the AC on. I couldn't get it to act up, stutter or turn off almost like before I cleaned everything. I can actually feel slightly each press of the pedal now - Makes me miss my S65 AMG, but thats a different story for why I've been inactive here for years lol.

Check out the new readouts afterwards. Mind you all, the car didn't want to start for about 5 seconds at first.....

Monday I will throw a can of sea foam into the gas tank and Saturday coming up, if it doesn't rain, I will put a can into the motor oil and then change the oil after the 10-15 minute mark of running it. Lets hope all my engine stuttering issues are resolved.

I will update this later if anyone is interested. But I still have the major issue of a very loud exhaust right from the engine bay - Something is loose and gets worse as the engine gets warm and stays warm - very annoying and loud and definitely not something you can be proud of :(