For some reason when i get just under 1/4 tank of gas not on Empty maybe 3/4 of a 1/4tank, my check engine light comes on. Also, I went to the track and it went 3mph slower when just under a 1/4 tank not on E thoa. I' m not sure but I'm thinking it is maybe leaning out or not getting the gas. But I can understand if it was on Empty and doing this but i have almost a 1/4 tank. What do you guys think is the problem.