Hey guys I got a evo8 the other day was driving and noticed the check engine light flashing connected the obd2 scanner to it no codes found so tonight I was on way home and was messing around with it and if I slowly get into boost and then punch it and its fine boost perfect and no check engine light then I was like ok but if im at 2500 rpm or 3000 rpm and give it decent amount of gas and bam check engine light flashes yes ive read around and people say knock sensor but wouldnt it pop on no matter what even at full boost if thats what it was but if I baby it get into 5psi and punch it it fully boost and easily gets to rev limiter and I can keep shifting through all gear and no l8ght

 

knock , knock....??

 

You should check to see what rom is in the car. The tephra roms have a "Flashing CEL on Knock" feature. If this is the case, then your check engine light will flash whenever a certain amount of knock occurs after a certain amount of engine load. You may want to get your car tuned if your engine is knocking/detonating.