When I signed up on the website, I did not include much information regarding my 1992 SSEi. Now that I have become accustomed to the site (especially the forum) I would like to modify my original information. I tied looking for a way to accomplish this, but I have failed. Any help is appreciated.

just log in and go to the profile button up top

there you can change your signature, location, etc...

But (and thats a big but), where can I input information about my car?

Signature.

you can put all your info in your signature

Appreciate the help, thanksabunch!!!!