Re: high hydrocarbon in exhaust

["rendy_cheng" <rcheng@xxxx>]

<This is from original question poster>
After following the advise on this forum, I have replace the O2 
sensor, spark plugs, spark plug wires, Dis cap, dis rotor.
Earlier today, I had my car smog check again.. Guess what? It 
failed the test again. Result from the test are following :

HC (ppm) Max allow:150 My car: 111,
CO (%) Max allow:1.50 My car: 0.54
CO2 (%) Max allow:NA My car: 13.8
O2 (%) Max allow:NA My car: 1.1
RPM 2466

So... for high RPM, it is okay. The following values are from idle 
case.

HC (ppm) Max allow:120 My car: 241 (too high)
CO (%) Max allow:1.50 My car: 0.67
CO2 (%) Max allow:NA My car: 13.4
O2 (%) Max allow:NA My car: 1.5
RPM 734

Other than catalytic converter, what else can be the cause of 
this..

Thanks every one!

rendy #4220

> Hi
> 
> Yesterday, my Delorean failed the smog check due to high 
hydrocarbon. The 
> technician played the rpm little bit but it did not lower the 
hydrocarbon.
> The technician has suggested me replace the catalytic 
converter. I 
> thought the catalytic converter support to last forever. There is 
no leak 
> on my exhaust system. My car does idle a little low around 600 
rpm. I 
> also notice a little less power from the engine and higher fuel 
consumption 
> in recent months. My car is approaching 30k miles and still 
has the 
> original O2 sensor. Does any one has idea what else I can do 
before I 
> replace the catalytic converter?
> 
> I would like to thank everyone in advance.
> 
> Rendy #4220