Help! Failed Emissions!
11-08-2005, 03:29 AM
#16
1. "According to my print out, HC and CO fail, NOx passed. relative air/fuel is around 30% rich." - mjensen -
2. "I realized that the afm to intake o-ring needs to be replaced. The afm was extremely loose" - mjensen -
Since #1 indicated a rich running mode, the #2 would cause the opposite effect and
thus not the problem of the emission failure.
Check these:
1. fuel pressure
2. misadjusted AFM (if used) or a bad MAF (if used)
3. a bad water temperature sensor, connections, or grounds
4. bad O2 sensor (if used) or grounded lead
5. check that WOT input is not grounded
2. "I realized that the afm to intake o-ring needs to be replaced. The afm was extremely loose" - mjensen -
Since #1 indicated a rich running mode, the #2 would cause the opposite effect and
thus not the problem of the emission failure.
Check these:
1. fuel pressure
2. misadjusted AFM (if used) or a bad MAF (if used)
3. a bad water temperature sensor, connections, or grounds
4. bad O2 sensor (if used) or grounded lead
5. check that WOT input is not grounded
