my car is driving me nuts. i was told i might of blew a fuse, then someone else told me it might be the computer. it does not want to shift right. i don't know how fast i am going or how much gas is in the tank cause gages are not working. it hits 3000 rpms and starts grinding and check engine light comes on. i am going crazy. i have 3 kids to run around and i don't know whats wrong. is it going to blow up or is it someting simple and affordable that i can get fixed?