xxRONNIExx

Well my 94 didn't pass smog this mourning. The visual and functional check passed but the emissions didn't.
I was told it was letting out high Hydro carbons. The max you can have at 15mph is 58, I was at 148 and at 25mph (max is 34) I was at 61.
What can cause high hydrocarbons?
I took out my Longtubes and put in some smog legal pacesetters and a new catalytic converter. Could that be one of the causes?

SS RRR

iTrader: (2)

It can be from a mess of things. Easiest question to ask is did they test the car when it was at operating temperature?

Here's a list of crap:

http://www.smogtips.com/failed-high-hydrocarbons-HC.cfm

djjab57

iTrader: (17)

No cat defiantly cause a problem

SS RRR

iTrader: (2)

What kind of catalytic converter is it?

arizona iroc

They told me I needed a new egr valve when my Formula failed. It turned out I just needed to take the old egr out and blow out the carbon from the valve and the back of the intake manifold.

http://shbox.com/1/4th_gen_EGR.html

I aced the test after that. Hope it helps

xxRONNIExx

Thanks for the help guys...I think this might get expensive just trying to figure out the problem. Can you also fail smog if you engine is running rough?

pillarpod

if its not running proprerly, i would say yes, its sure isn't going to help