Failed Emissions with high NOX
#1
Failed Emissions with high NOX
Maximums allowed: HC: 0.80 CO: 12.00 NOX: 2.00
1st Test: HC: 0.68 CO: 6.34 NOX: 2.30
After the first test failing due to high NOX i removed the Hypertech tuning and ran it through again.
Retest results: HC: .63 CO: 5.82 NOX: 2.02
Almost passed on the retry but still high NOX.
Any suggestions? The guy a the testing center says its most likey NOT the Cat, or else the other numbers would likely be higher as well.
1st Test: HC: 0.68 CO: 6.34 NOX: 2.30
After the first test failing due to high NOX i removed the Hypertech tuning and ran it through again.
Retest results: HC: .63 CO: 5.82 NOX: 2.02
Almost passed on the retry but still high NOX.
Any suggestions? The guy a the testing center says its most likey NOT the Cat, or else the other numbers would likely be higher as well.
#3
Otherwise is it running hot? Too much timing (but you set it to stock anyway), bad cat, possibly carboned up pistons and combustion chambers. Make sure to use premium gasoline - that will help too.
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