Hi guys, my GF just about a 1994 Honda Accord LX w/200k miles. It has a slight rough idle but other then that the car runs strong and is in damn good shape for it's age. She took it for an emissions test and It passed the high speed RPM test but it failed the low speed RPM test. I have a few guesses as to what it could be but I would like some help if some of you know based on the test results what it could be narrowed down to? Please let me know if you can help. Thanks :D

<u>Test Results</u>

High Speed
RPM = 2348
HC Reading/Limit = 30/180
CO Reading/Limit = .10/1.20
CO2 = 14.7
O2 = .07
Test = Passed

Low Speed
RPM=0767
HC Reading/Limit = 239/180
CO Reading/Limit = 2.58/1.20
CO2 = 13.2
O2 = .01
Test = Failed