Over the weekend I tried to smog my stock 91 dx and it fail the NOCs test. I took the test to my work and asked the master tech he said it could be running to hot , timing, or fuel pressure. I got it to run cooler and adjusted the timing to 16deg btdc and it helped a little. I am using a a/f guage and now it moves around in lean, before it just sat at lean. Took fuel pressure guage off my race car and it read 37psi. Pulled the injector out and it looked clean. Can some one help. Need to pass smog.

 

Hey hope you get that problem fixed. I remember you talking about it last night. If only I knew some kind of magical cure to a lean mixture you haven't already tried.

FYI this is Adam (with the white Integra). Had to wash the car at 10pm to get all that oil and fuel that sprayed out during the compression test haha.

 

get a new O2 sensor
i think i tmight be fried
what setup u got??? ecu engine etc...
if u got the 37psi of fuel thats the normal pressure anyways...
change the o2 and see if the readings change. some A/F gauges arent good with a bad o2