So the check engine light has been a issue since you bought the car, and it is now stalling at idle. You have replaced the MAF and cleaned the throttle body. Is this a accurate assesment of the condition of the car? It is different from how you initially described the car and it makes it harder to try to isolate the problem.

Ok lets try this one last time. Clean the iac. Do a complete tuneup with pvc valve, fuel filter. Run a compression check. Check every vac hose, replace any that are split, cracked.

 

See the car runs fine now. no more idle issues and engine shutting off, and it helped after cleaning the throttle. but that check engine light's still bothering me that's y i took it to auto zone and they said 430 is due to bad cat or exhaust leak
I will get home and work on it.
Thanks a lot for helping me

 

where's the IAC located at on 02 es300
Thanks

 

Ok, my mistake, I did not realize that you have electronic throttle (no throttle cable). So I would suggest a complete tune-up, including fuel filters. Since you have had the car for only a couple months, and there were issues when you purchased the car. This would be a good start. Whlie you replace the spark plugs, run a compression check. This will give us a better idea of what the condition of the engine, and a better idea of which direction to proceed.

Also throw a couple bottles of fuel injection cleaner into the tank.

 

George, Which fuel injector cleaner would you prefer. Lucas, Valvoline, Chevron's Techron.

 

Guaranteed to pass - it's meant to help cars pass the emissions test, but it is the best injector cleaner I have come across - I put a bottle in an Altima with 150k on it - had to pull the injector bank later for something else - injectors looked like they came right out of the box new!

 

which one?

 

That's the name - Guaranteed to pass emissions additive. Since you live in Texas I know you can get it here.