my engine light came on again and its due for an inspection,perfect timming. I used to just unplug the battery for 20 minutes and this would fix the problem for about 200 - 300 miles but now it only last 16 miles befor comming back on.

I have 2 question. I was told that if you reset the light and try to inspect the car it will fail if not driven a certain amount of time. does anyone know how many miles this is?

and there used to be a great write up on cleaning out the egr valve with pictures and a step by step does anyone know where this is?

thanks