Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - 92 Honda Civic VX Failed Smog High HC at 25pmh

mars · 06-19-2014, 01:20 AM

My 92 Civic VX D15Z1 49 state(with EGR) failed smog @ 25 due to high HC. Here are the results:
15mph RPM 2474 CO2 14.3, O2 0.1, HC max 96 meas 28, CO max 0.59 meas 0.03, NO max 859 meas 689 Pass

25mph RPM 2319 CO2 8.7, O2 7.7, HC max 79 meas 146, CO max 0.51 meas 0.02, NO max 798 meas 382 FAIL

Replaced sparkplugs, O2 sensor with new OEM Dealer, ECU P07(eBay- used) Retested

15mph RPM 2452 CO2 14.4 O2 0.0, HC max 96 meas 37, CO max 0.59 meas 0.04, NO max 859 meas 434 PASS

25mph RPM 2209 CO2 9.0, O2 7.3, HC max 79 meas 123, CO max 0.51 meas 0.02, NO max 798 meas 516 FAIL

For both above tests, Timing is 14 BTDC according to smog Tech

I removed the brand new installed spark plugs after about 200 miles and #4 (close to the distributor) looks white and nice, #3 & 2 partially black, and #1 completely black.
Any help is appreciated.

06-19-2014, 01:20 AM	#1 (permalink)
mars EcoModding Lurker Join Date: Jun 2014 Location: Sacramento, CA Posts: 2 Thanks: 0 Thanked 0 Times in 0 Posts	92 Honda Civic VX Failed Smog High HC at 25pmh My 92 Civic VX D15Z1 49 state(with EGR) failed smog @ 25 due to high HC. Here are the results: 15mph RPM 2474 CO2 14.3, O2 0.1, HC max 96 meas 28, CO max 0.59 meas 0.03, NO max 859 meas 689 Pass 25mph RPM 2319 CO2 8.7, O2 7.7, HC max 79 meas 146, CO max 0.51 meas 0.02, NO max 798 meas 382 FAIL Replaced sparkplugs, O2 sensor with new OEM Dealer, ECU P07(eBay- used) Retested 15mph RPM 2452 CO2 14.4 O2 0.0, HC max 96 meas 37, CO max 0.59 meas 0.04, NO max 859 meas 434 PASS 25mph RPM 2209 CO2 9.0, O2 7.3, HC max 79 meas 123, CO max 0.51 meas 0.02, NO max 798 meas 516 FAIL For both above tests, Timing is 14 BTDC according to smog Tech I removed the brand new installed spark plugs after about 200 miles and #4 (close to the distributor) looks white and nice, #3 & 2 partially black, and #1 completely black. Any help is appreciated.