Hi, everyone, like two days ago, i just puy dp, exhaust and high-flow cat on my evo, it worked very good right after, but today, i drove my car, i saw the "service engine light" was oe, anyone can tell when is going with that? thanks!

 

 

You car doesnt like the new found flow! good fix
https://www.evolutionm.net/forums/sh...ad.php?t=98573

 

check the exhaust sensor, make sure its screwed in all the way.

Yup, go get it scanned at auto zone or what ever store

 

Most likely its P0420 regarding your high flow cat, but can't say for sure until you pull the code. Have it scanned at autozone or a local auto store.

 

This is the ONLY correct post in this entire thread. Don't go get scanned, and don't worry about it; do the CEL fix, or buy one from Perrin.

 

I disagree. While all signs do in fact point the CEL regarding the exhaust, there is still a chance something else could've triggered it. It doesn't hurt to get it scanned and to know for sure what triggered the CEL in the first place.

 

Happened to me before ..
i just Reset the Ecu .. and it's gone ..

 

i would bet on P0420. reseting not going to do anything, it will come back

 

thanks all, should i just go head to buy a simulator to fix it?

 

Mine has been in since I got mine...

 

Of coarse you check engine light is on. You have 2 02 sensors. One on your 02 housing, the other after the cat. If your either running a delete or a high flow the second sensor is wondering why theres so much more carbon dioxide. Try reseting your battery, if that fails pick up an 02 simulator from Buschur.

Your also the reason for Global warming. have a good one.

 

+1

But dont buy a simulator from Buschur, just do the mechanical fix for like $2 and save some cash. Drill out a spark plug anti-fowler. It works! Had my test pipe rigged like this for over a year with no CEL