i installed a turbo xs rfl blow off valve on my evo.
car has like 1000 miles on it and the cel came on disconnected my battery it was off then came back on. don't know what to do..

 

You don't mention if your BOV vents to the atmosphere, or is recirculating.. But if it does Vent to atmosphere, I've heard about several people who are getting CEL indicators because its confusing the computer (It doesnt quite know to compensate the fuel mixture for the missing air) Some people are even getting stalling and rough idle.. If it is a recirculating valve, make sure its installed correctly and that its inlet and outlet aren't reversed..

 

it vents into the atmosphere and it is really anoyying the **** out of me that damn light....

 

a little off topic, but i am really suprised that most of you tuners dont have a OBD II code reader. I have one that i upgraded to a scanner and i can get real time information that the ECU is reading. you can see codes, what they are, and clear them.

i suggest you all get one. VERY HANDY

 

where can i get one and how much are they

 

http://www.autoxray.com/default.htm

not sure cause mine came with my supercharger kit for my galant....but the upgrade cost like 140$$

with the upgrade you can read alot of stuff but most importanly

1) air intake temp
2) coolant temp
3) o2 sensor readings in Vs
4) air flow in lb/min
5) and a few more

but you can also read codes and clear them

 

i've got a couple differnt scanners for OBDII, however the new compact OBDII Reader by INNOVA, it is loaded with hundresd of codes as well as clears stored codes too, and tests the emission coponents, same things a smog station will look at.