ecu code scanner?
 

http://cgi.ebay.com/ebaymotors/1986-...48105536QQrdZ1

is this worth it?

anyone have any experience with this product?

Absolutely not worth it IMO.

You could wire up one yourself for $5 or so. You could even wire it in permanently with the lamps in your dash somewhere.

Here's the same instructions that seller probably followed...

http://www.teamfc3s.org/info/article...odes/main.html