Also check your AOS tube connections. I had one not properly seated which caused a vacuum leak and triggered multiple codes and limp mode. Data logs showed the car running really high fuel trims which lead my right to the culprit. Post your codes if possible and I'll compare to the ones I had. They were all over the place.

 

I'm curious to see what your issue is. More than likely a post header exhaust leak right before the secondary O2 sensor.

 

I texted the SA this morning but have not heard back. Will update soon. I just want the car ready for the 20th's track day !

 

Just called and they are going to text me the codes. He said the car was throwing codes for running too rich. They said it was the MAF sensor that went and they are ordering a
new one. Not sure if this helps

will post codes later

 

This exactly what the tech told me its doing. He said its running really rich.

 

I know you were recently adding an additive to clean the injectors? If I'm not mistaken...could that possibly had the car running too rich? Or thrown the MAF sensor off?

 

Almost zero possibility of that. Air leak in the AOS or MAF issue are the likely sources. AOS would be more suspect as it is the one piece not tested by Lexus for reliability.

 

Perfect timing, while at it at the dealer, tell them to check everything for the track day...

 

Okay, Thank You!

 

Did they send you the codes???

Also did you have them check the front OEM connections for leaks??

Regards,

Joe Z

 

I waited all day and no codes. They just said it was the MAF sensor ad that the codes showed that the motor was running rich as hell. I told him that the AOS could have a seal issue that would produce a vacuum leak and codes. I told him I want him to have the tech tighten up all the bolts for the exhaust and to make sure the AOS hoses are secure. If there is any issues after the MAF is replaced tomorrow I will have them just remove the AOS until I can get a new one from Rafi.

I will text him in the morning for the codes again

I would like to thank each and every one of you for your help . Thanks guys.

Will update soon. I just want it fixed because track season is rapidly approaching and I dont want any issues. Just got a fresh set of rear AD08Rs and its time to play !!

 

Nice good to see it was a minor fix

 

fingers crossed. I am going to have check it all out. Most likely the MAF sensor or AOS, but in the case of the AOS it would run lean. I am hoping that its just the MAF sensor.

 

Only for a moment, then it would throw all of the available 20% correction rich into the equation. The ECM's job is to run the engine and fail to least possible damage when something goes outside normal parameters. So it will go pig rich instantly when there is an intake leak. AMHIK.

 

Thanks for your insight , Lobux. So it point more towards the AOS . Rafi had mentioned that it would throw a code for running lean but then again, it could respond to conditions and correct as you are describing and go rich as the tech and SA had mentioned .

Thanks, Lance


These guys seem like they are guessing sometimes. You could probably school the shop foreman with your level of technical info and knowledge on this platform .