Failed Emission Test Massachusetts

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

95atxsho

New Member
Joined
Jul 8, 2004
Messages
54
Reaction score
0
Location
Massachusetts
*Revised* -Failed Emission Test Massachusetts

1994 SHO ATX 148K, Tuned it up Saturday (Plugs and wires, fuel and air filter, oil in plug wells, not much though compared to 2-95's I had), runs great, I don't know what i'm reading but here goes:

HC=Pass
CO= 00.5.44 Reading Limit 020.00
NOx=02.94 Reading Limit 02.50
CO2=295.18 grams per mile
It says your vehicle has failed the cruise portion of the test.

As usual Thanks for all your help.
Paul
 

AutoSHO

No SHO = Mo $$$
Joined
Jan 16, 2001
Messages
6,979
Reaction score
17
Location
Fort Collins, CO
High NOx translates to a lean condition, which is typically caused by bad oxygen sensors.
 

HopefulSHO

SHO Member
Joined
Jun 24, 2002
Messages
1,154
Reaction score
0
Location
Bellevue, NE
AutoSHO said:
High NOx translates to a lean condition, which is typically caused by bad oxygen sensors.

What he said. :) Also might be about time to clean out the EGR passages..The sole purpose of your EGR valve is to lessen NOx emissions.

Was the car good and hot when they tested it? Converter's gotta be real hot to do their job right.
 

95atxsho

New Member
Joined
Jul 8, 2004
Messages
54
Reaction score
0
Location
Massachusetts
Yeah but, the O2 sensor would throw a CE light or blink under accelaration, the car runs great. It was hooked up to the dyno. EGR might be a good call. I'll look in there over the weekend.
Thanks Guys and happy motoring.
Paul
 

AutoSHO

No SHO = Mo $$$
Joined
Jan 16, 2001
Messages
6,979
Reaction score
17
Location
Fort Collins, CO
The Oxygen sensors will not always throw a code as they get old and lazy. They only throw a code when they get very bad.
 

Forum statistics

Threads
107,077
Messages
1,181,195
Members
16,142
Latest member
Kaevorlly

Members online

Back
Top