Let's keep this simple...

Higher HC at idle just means you have some extra unburnt fuel flying out the exhaust.

Make sure the car is completely warmed up... take it for a good steady spin. Don't accelerate to hard or to often, but drive atleast 15km then go for the test.

Steps to take before you go....

1.)You need to install new spark plugs BPR6ES and gap them to proper specs 0.28.

2.)Raise your idle to 1000-1150 rpm this just below the 1200rpm limit.

3.) Install a stock MAF sensor for the test unless you can properly tune the maf-t.

4. Make sure your base timing is correct (with a timing light)

Then if the above doesn't work you can always

run lower octane gas for the test.. or and even slightly advance timing by 0.5-1 degree giving you a leaner burn. However your NOx might increase slighty.