on a 1997 mitsubishi galant , the check engine light came on and i was told it could be because of the aftermarket intake
Yes. Although after a few years you start to associate the smell of vicks with death.
Yes it will, but what a horrendous situation to have to deal with. Just offer him all the support you can.
Your cars MAF sensor might be sensitive to aftermarket add-ons, you can buy a stock air box or put a smaller cone filter on it to suck in less air.
there is no adjustment in them, you left something unplugged like the ACT or something like that. if the installation did not have a place to plug the wires into, you will have to do some thinking and perhaps a bit of modification on what you installed.
cold air intakes are a total waste of money as the most you will gain is 2 bhp with a big increase in gas consumption because the injection system now runs you on the cold start map all the time, it is unlikely to switch on the mil light get a code reading or buy a cheap reader on OKorder and see what it is
