I would like to hear from people that modified their EVOS and, as a result, ended up with the check engine light problem. Was it resolved, and what steps did you take to pass the emission test. Love to hear from anyone with similar problem.

 

what check engine light problem? everyone with modified evos in CA do under the table smog tests, its the only way

 

I see you are from Chicago.at smog stations they looking for codes. It all depends what mods do you have. For example if you deleted your egr you can take your car to evo performance shops and they can fix your ecu and you wil have no problems again. But it could be simple stuff what triggers your cel. You need to scan it first and pull the codes. I have no cat and egr system but it's taken care of. 2 months ago I passed in Addison on E85 lol

 

So far I have not had problem with my Evo, and its been moded.

 

You need to search more, look for CEL or check engine light

 

Good to know. I sometimes get a miss fire when I first start the car. I think that's one or the errors. once it warms up it runs great. My car was built by AMS. I took it back and were not able to eliminate the problem. The first test, I had it flashed filled it with E85 and passed. they gave me a hard time due to missing idioms as they called it " non-supported systems" I am sure they were talking about my missing EGR. it comes out on the spreadsheet with 3 " non-supported system readings. I put the cat back also mainly for noise. I was getting too may ticket, and it was a good thing. In Chicago, they check for missing cats. I should try to find a friendly station.
I know the test is coming up so I just want to get ready for it. I LOVE MY CAR I might have to register it outside cook county.

 

Thanks, I will. and that's what I am trying to do. I ben googling but have come up short so far.

 

I got bolt ons and passed a star smog . I did put the cat back on due to the code for the rear o2 sensor. And the stock box and that's it. They didn't use the sniffer. It was all visual and codes. Hope that helps. This is in california by the way.

 

Helps if you have a list of the codes... CEL could be many different things..

 

Engine lights? Never really had a issue with light, i had a past code for crankshaft position sensor. Also I dont have problems passing emissions, but if thats the issue i have friends that can get me through emissions for 40$

 

O2 sim fixed the cel for exhaust

 

I've a evo9 and i've had 0 issues as far as passing emission and check engine lights coming on