Failed smog on s14
 

I got a stock s14. Just recently tuned up as well. Fail smog testing today. High HC and High CO. Perhaps shady smog tester? Here are the numbers:

15mph test:
HC=440. Max is 88
CO=11.68 Max is .52

25mph test:
HC=466 Max is 53
CO=12.22 Max ix .50

I forgot to run the car a few minutes before pulling up to the shop. Cold cat perhaps?
I heard of this HEET fuel anti freeze may increase the chances of passing smog. Does it work?
Ehhh not sure what to do.

cat still good?
o2 sensor good?

I just checked my ecu codes. I got 34 and 76.
The knock sensor and the fuel injector system.
So I should change my knock sensor. But how should I go about checking the fuel injector system?