After installing a cold air intake on my Hyundai v6 Tuscan, i have a check engine light w two codes...read on?

Question

im getting two codes after installing a cold air intake on my v6 2.7ltr Hyundai Tuscan, PO171 & PO174, both are related to fuel too lean? ( according to the Pep Boys store). I checked the connections for airleaks and all is tightened still...The car is running good....what should be my next step? Please note I am not a car mechanic at all. and thanks.

Answer 1

a cold air intake creates a more consentrated charge of air and fuel (ie if you put a balloon in the fridge it shrinks due to the molecuels gathering closer together). in this situation, you are adding more air (oxygen) into the combustion mixture. more fuel can be fit into this mixture to cause a bigger bang and therefore more power. the optimum mixture is 14.7:1 air/fuel... ie 14.7 parts of air to 1 part of fuel. if you allow more air, you will offset the mixture ratio and possibly cause the emission equipment (check engine light) to come on. you will not notice any real performance problems with such a small change (that is why the car seems to act fine), but your computer knows it.

first, make sure all the sensors are connected properly. second, you can buy a computer programmer (ex... Superchips and the like), to reprogram your ECM to accept the changes you make. They run about $400 though.

either that or you have another emissions sensor bad... ie an O2 sensor, air flow sensor, etc... going bad, and it's just a coincidence.