code po300

Hey ya'll I currently just purchased the ebay short ram intake, and it suprisingly sounds good. Anyways though I'm a hundred percent sure i installed everything right but now I got two different check engine light codes. First one was P0300-random misfire, and second time was P0171- bank 1 too...

I have a Mazda 2002 Protege Sedan. Last week it had the engine light go on suddenly on the freeway after a sudden loss of power. As you might imagine, I, a woman lacking in automotive smarts, was rather paniced. I went to the nearest trusted station I could find and they found that some...