Alex-evita

The only thing you have done wrong is fit a pod filter. Plenty of people have tried it & have gone back to the standard air box. It has something to do with how the air flows over the MAF sensor. Mess this up & you'll have all sorts of problems. The 3SGE has a funny set up & is very sensitive. Looking at yours, you have the MAF sensor way to close to the filter & it will be getting very turbulent air passing over it. If you'd done a bit of research on dedicated Altezza forums you would have found this out already. You might also like to know that you'll make less power with a pod filter than the standard air box anyway. So get yourself a K&N or similar panel filter & be done with it. If you want a bit of induction noise at lower rpm, disconnect the vacuum hose to the flap in the front air intake. This flap is normally shut until about 4500rpm to suppress intake noise. Disconnecting it leaves the flap open all the time. (see attached pic)

While you've got the air box off you should give the MAF sensor & the throttle body a quick clean.

thanks a million!i have found lots info about pod filters,and 100% sure i will back to original box with apex panel filter,and about vacum hose,i'll try it !thanks a lot again!and sorry for bad english

welcome to loc mate, just a guess as i dont know your engine setup but sounds like you've not conected the air flow sensor correctly, but that is just a guess.

thanks a lot,i dont know what to try else,sensor was fited(i think)correctly,same angle like in original air box,and had very good sealing, i don't know! i had mitsubishi galant and mirage,and i did custom air intakes without any problems(it's a easy)but 3s-ge difierent engineg so im very confused now!

hi guys!im new on this site,and first time i have a toyota car(altezza),my model is rs 200, im happy with a power but i like perfomance, so first my thought was to fit short air intake,i have cheked most sites for proper air intake,but all very expensive,over 300£ for rs 200 only.So i have made custom one.Fit it.start a car and oooopss!!!car wont working properly,rpm to LOW,and and rpm arrow jumping,after this problem i fit back original air box,but still want perfomance air intake.WHAT I HAVE DONE WRONG?Could u guys help me with it???(air intake on picture below!)