Hey so my tabs will be expired in 2 days, and Im need to pass emissions,and I have 1999 civic ex with b18c swap, and obd1 ecu, NO cels, one problem is that I have 2.5in piping, and my CAT clogged recently and I gutted it out, but the o2 sensors still in and no CEL... Will I be able to pass?

 

definitely no pass! gutted cat swapped motor with obd1 ecu! better to just do an illegal smog bro

 

No, you will not pass.

You need a cat!

 

so if I put on a cat, it'll be all good?

 

You're hearing something that wasn't said. With what you have now you will fail. Get a cat put on and you have a better chance of passing emissions. Aren't your tags expired today?

 

I can't say that. For a few reasons, I don't have the car in front of me, I didn't do any work to it. No one can say it will pass without a doubt.

Take it in, and give it a shot after a cat. it wont cost anything besides gas.

 

Yeah my tabs are expired, dont I need a paper coming in the mail, thats stating that I need to pass emissions?

 

You need a cat, an OBDII ECU, and idk if you have one or not, but you'll need a rear O2 sensor, crank sensor, and EVAP system hooked up. Also, the ECU can't be JDM because the OBDII emissions testing equipment can't read JDM ECUs. After you've got your ECU, cat, and other items squared away you're going to need to drive the car around for about 30 minutes to set the readiness monitors otherwise it'll fail emissions for "Not Ready".

 

when I bought my car, it was from a older guy, everything was the same, except it had a obd1 p28 ecu usdm..

 

So I put on a bigger cat today, and a new o2 sensor, and passed the inspection with flying colors still have my obd1 p72 in, I just told the lady that my obd2 reader plug isn't working..

 

Hope this helps for future washington guys that are worried they're gonna fail..

 

It might be worth mentioning in here that some counties in WA don't require emissions, so if you were to purchase a car from one of those counties but live in a county which requires emissions, you might want to keep that in mind!