Quote:
Originally Posted by HaVoj
I have a '13 scion with Injen intake, Greddy catback exhaust, motive front pipe. With all that do I need a tune? I love the way the car felt and sounded after start up but once the maf kicked in after a day or two it went back to somewhat normal. Any advice?
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Intakes can alter the fueling and afr on your car as the MAF sits in the intake it samples basicly the velocity of the air passig it to determine air flow, if the intake changes the velocity of the air past maf then it can throw fueling off, this is eespecially true if the intake alters the positioning of maf in air flow or the diameter of tube the maf sits in.
The ecu will attempt to compensate but doesnt always get it correct.
intakes on the whole produce little power gain.
if ir was me i would sell the injen intake put money towards a set of catless headers and a tune.
have a read of the basic bolt on mods guide below link in blue