I recently purchased an is350 I went on a small trip and know it wont shift until about 3k rpms or higher so there no low end power also I reset my battery to hopefully reset my ecu and now the windows dont roll down and my check engine lights dont show for my cat fail...? Anyone have any ideas?

 

spark plugs, make sure they arent fake, also everytime you dc the batter, you have to manually reset all the other window switches, hold down for like 10 seconds i thnk

 

so replacing my spark plugs would be my best bet? Any other possible solutions? I'll try to rest the windows tomorrow.

 

I had the same issue and new spark plugs solved it. Not sure if it'll solve yours but it sounds like the same problem I had. Make sure there are no leaks and all the bolts are tight.

 

Unbolt and clean the MAF sensor with MAF cleaner. If it doesn't know how much air is entering the engine, it can be sluggish.

What happens if you manually shift it? Please explain this.

 

Maybe your port injector is clogging.

Try a round of injector cleaner to see if it help.