Quote:
Originally Posted by blackrms13
I know this is a old thread but I just failed my smog
91 S13(about 115k) with a stock 95 OBD-I KA(68k), I believe it is a non-cali engine
New Plugs/Wires (about year ago)
New O2 Sensor (2-3 weeks ago, but the tech said "something is wrong with it b/c its running very rich)
2.5inch catback
NO reading is like 7xx max right?
I got like 3000+ reading...
i warmed up my car pretty well before doing the smog(drove from riverside to LA, about 1 hour)
I know the timing is off for sure(well after the test....) need to find a timing light first
gas cap failed(bought a new one right afterwards)
from reading this thread, i assume its time for a new cat?
thanks to whoever can help
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if your NOX reading is high then you're running lean not rich. NOX is the production of excess heat in the combustion chamber. a lean condition will cause the NOX number to be excessively high. If all your other numbers were fine, it's not the cat. Try retarding your timing a bit or getting a step colder plugs. this may help.