[QUOTE=Duke2.6]Look at the tuneup/emission label in the engine compartment and list the codes. In particular I am interested if it has an oxidizing catalyst (OC) or a three way catalyst (TWC). Also, does your car have O2 sensor(s) and EGR?
It has a full time smog pump and EGR. Where should i look for the O2 sensors? Would this be a model that has the cats close to the exhaust manifold?


I expect your car is pre TWC/O2 sensor in which case it would have an OC and a full time air pump, no O2 sensor(s), and maybe EGR.
Is this a better situation for diagnosing smog problems?


I need to understand the emission control architecture before I can offer a useful diagnosis of the test data.

Do you have any previous emission test data?
unfortunately no



I am assuming that this car is either a US or CA model (stated on the above referenced label) and NOT a gray market car. Is this correct?
Yes, to my knowledge


Does anything in the engine compartment appear to be jerry-rigged?
[I]no, just stock with a few new wires here and there[I/]


Fuel tank cap holding pressure has nothing to do with tailpipe HC readings.
Is there a rubber gasket that will fit the gas cap instead of buying a whole new gas cap?


My hunch is that the high HC readings with everything else okay are due to misfires, which points to the ignition system, but I'd like more information.

Duke

Hopefully this will be enough information. If it's not, please let me know if I can provide you with more. I'll try to look back for previous smog check data.Thanks in advance!