I just got a 91 crx HF with B16, it fail the emissions here in NJ cause the NOx, the standard is 1304 my reading was 3081.I don't get any "check engine" light or anything else.
I am open to suggestions.
Thanks
Petrosvr4@aol.com

 

Probably need a new cat. It sounds like your current one isn't doing anything.

 

Poor kitty.... :lmao:

 

hard to say one way or another without a test printout. A bad cat. will cause your type of NOX readings though. I wouldn't ever diagnose off one gas reading. What's your oxygen and co at??

 

Here are the readings:
Gas Standard Reading Result
NOx 1304 3081 Fail
HC 166 166 Pass
CO% 0.93 0.75 Pass
CO2% 13.5
O2% 0.6

In case i need a new cat, where is the best place to get it?
Thanks for the help
Petros

 

Either off of EBAY or if you dont wanna wait and want something to pass emmissions goto AUTOZONE and get one or any auto part store...there CHEAP but it will get you to pass!!!!

GOOD LUCK!!!

 

Any other thoughts ? Do these readings mean that i have a bad cat. conv.?
Thanks

 

well most likely its your cat. You just passed on your hydrocarbon readings. If you replae your cat your HC readings should decrease as well. And make sure you have enough coolant in your system. Lack of coolant will cause your NOX to go high as well. Another thing is to make sure your EGR valve is functioning properly. If you have to remove it and clean it out. And make sure the ports are clean as well. Most hondas fail nox becuase of the EGR valve. So serivice the EGR for sure. Possibly the cat. The last thing to keep in mind is, if you are burning oil it will cause your cat to go bad becasue the oil that comes from the engine will foul your catalytic converter. Thus causing your HC's to rise.

 

I don't think there's an EGR on the B16a.

 

No EGR on my B16A