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i have a 2000 toyota celica gts, and i just put a cold air intake on it. now the check engine light is on. when i had it read it says the front bank is burning lean. do i need to upgrade the mass air flow sensor?  

Is your car chiptuned already? If it is not, get it chiptuned and you will get aditional HP, at the same time, the air flow sensor will be set correctly. If you won't get it chiptuned, you will just pay for the seting of sensor....and my guess is that if you got cold air intake, you want to get your car faster

I chiptuned my Renault Clio 1.5 dCi from 82 to 105 HP and there is considerable diference in power. I had a problem with air intake because of the normal filter. That filter didn't let through enough air so I got false readings. I got Green Filter brand of racing filter, but it fit to the same place than filter before (I didn't get the cold air intake kit). Now everything works fine and the engine is more responsive.