Passing TX emissions test...help......

[TX_Snake]

95 Cobra, all stock. 200k.
Since the second test I have replaced the spark plugs, cap, rotor, wires, fuel filter. Car has a functioning EGR valve. I have not been able to go retest the car since the tune up.
I want to check my smog pump for functionality, but unsure of the test procedure. I'm trying to not have to buy new cat's if I can help it...

Any ideas? Tips, hints, help in general?


Initial test results were with O/R H pipe ( I didn't realize the car did not have cats..)

High Speed Emissions Results (25mph)

Standard Current reading
HC(ppm) 108 136 FAIL
CO(%) 0.60 1.07 F
CO2(%) no std given 10.50 F
O2(%) " " 6.4 F
NOx(ppm) 751 1179 F
DILUTION(%) >6 11.6

Low Speed Emissions Results (15mph)

Standard Current reading
HC(ppm) 112 198 FAIL
CO(%) 0.62 0.93 F
CO2(%) no std given 10.6 F
O2(%) " " 6.3 F
NOx(ppm) 829 1424 F
DILUTION(%) >6 11.5

SECOND TEST WITH OEM CATTED H-PIPE (4 CATALYTIC CONVERTORS ON OEM H-PIPE)
*Performed at a different inspection station as initial station machine stopped working

High Speed Emissions Results (25mph) @ 2388 RPM
HC(PPM) Standard Current reading
HC(ppm) 117 141 FAIL
CO(%) 0.65 1.08 F
CO2(%) no std given 11.5 F
O2(%) " " 4.5 F
NOx(ppm) 821 1036 F
DILUTION(%) >6.0 12.58 PASS

Low Speed Emissions Results (15mph) @ 2427 RPM
Standard Current reading
HC(ppm) 120 151 FAIL
CO(%) 0.67 1.00 F
CO2(%) no std given 11.5 F
O2(%) " " 4.5 F
NOx(ppm) 907 1032 F
DILUTION(%) >6 12.5 PASS

 

[TX_Snake]

Ran a self test, got 564, 721, and 821. 90/90 on cylinder balance test ran 2x. Got a check eng light on while driving home down the highway for a few min then it went off. car ran normal. also have a surging idle even with a new IAC. Surging idle also came on recently, IAC was replaced a month ago and has been running normally until last 2 weeks.