So I just installed my test pipe and downpipe on the evo. Screwed in the o2 to the midpipe of the catback... From my understanding the check engine light should have come on, correct? Any reason it might not have come on? Thanks.

 

give it time

 

get a pair of the spark plug anti foul thingy ready...

 

you drive a evo 4?

 

Mine only comes on after 50 miles, but recently has been coming and going.

 

Its luck of the draw really. When I had my testpipe I was able to just screw in the O2 sensor without any foulers and never got a CEL for the that. Then again some people get it right away.

 

it might take a couple hundred miles but dont worry, it will eventually come on

 

All good pionts
+1 give it time.
+1 spark plug anti foul thingies do work!
+1 what kind/year is your evo?

 

Sorry just got a chance to check my post. I am fully prepared to be flamed for I just realized I poset my ride as an "evo IV" wow. Well I'm an idiot, change that soon. I have an 06 evo 9. I guess I'll wait a little longer and see what happens?

 

Usually it takes a highway trip to trigger a CEL when using a test pipe.

 

good for u my come on like after 2 days

 

Yup, mine came on at about 50 miles everytime. Always during a quick accel.

 

get a mechanical o2 fix . i have 2 in my catback, over 200 miles now...no ses light.

 

I tried that spark plug anti-fouler trick and it didn't fit. The threads were right, it just wasn't big enough in dia. I ordered a fix from Gruppe-S for $13.99, I heard they work great. Does your car spool OK now? I can't run all the boost I was before, even if I crank up the BC.

 

i have recently installed a test pipe in my car as well where can i find this
Gruppe-S solution. getting pretty tired of the car running like crap.

thanks