This is on a Civic VX (Stock) with approx. 130k, new wideband already.

Anyway, what would cause high hydrocarbons on such a car?

The car also just got the standard tune up, could it be timing?

This is my first time dealing with emissions stuff, thanks!

 

hydro carobon is incomplete combustion. if your Nox was high, id say timming. whats the condition of your catalytic converter?

 

This is on behalf of a friend, but the NOx is fine, and he thought the cat was gone but Honda (who did the inspection) said it was fine.

Anyway, I still suspect the cat, does anyone have a CX/VX/STD/HF cat for sale that's not dead?

 

So here are the specifics:

Emmision COntrols Visual/Functional Inspection:

EGR System: Pass

PCV System: Pass

Fuel Inlet Restrictor : Pass

Catalytic Converter: Pass

Evaporative Control System: Pass

Gazs Cap Integrity: Pass

Tailpipe Emmissions Inspection:

740 RPM, CO Reading 0.07, Limit 1.20, PASS

2381 RPM, CO Reading 0.11, Limit 1.20, PASS

740 RPM, HC Reading 239, Limit 220, FAIL

2381 RPM, HC Reading 116, Limit 110, PASS

So it failed because its about 10% over on the HC only at idle. The report also notes that it failed emmissions inspection because of the high HC and because the gas cap is bad.

Any ideas?

 

i really don't know if running 91 octane would help, my friend told me to try it and it should help.