I have an 88 Integra RS (as if you could not tell by my handle, LOL). Recently failed smog due to NOx emissions, which points to EGR valve problems. However, with the OBDI, no codes are blinking on the ECU LED under the passenger seat. Chilton's describes testing procedures for the EGR, but has no info on where the EGR valve is located, only the EGR valve controls such as the solenoids, etc. Can anyone help me out with such an early model? Any help with locating it, or other reasons why NOx would be high will be greatly appreciated!

 

Don't know about earlier ones, but my '95 doesn't even have EGR. Maybe yours doesn't either??

High NOx...
Lean mixture?
Spark advanced too far?
Combustion-chamber deposits?
Bad Catalyst?

 

No EGR - that's what somebody else said in another forum. Hard to believe, as they have been around since the 70s! Well, I will look at the other things you mentioned. Hopefully, it will be cheap to fix, as the car's only worth ~ $800. Otherwise it may be time to get a pre-74 car which is easy to work on and does not require CA smog! Thanks for the tips!

 

There's a smog spending limit--depending on the value of the car, there is a monetary cap on the amount you are required to spend smog-legalizing your car before you get an automatic pass, which I think is a bit north of $100. Check it out--it can be an opportunity to get some other stuff done to "smog legalize" your car, AND you'll get an automatic pass.

 

i had same problem try change cat convertor