hey guys just put some NGK R5671A-8 spark plugs in that my mate recommended me to use & now my ecu hand controller is spazzing out coming up with all weird readings on it. it also was blowing some smoke with black liquid out.
why would this be?
engine is an rb25/30det conversion with gt3076r, aftermarket ecu bla bla bla
any help would be great
cheers luke