OK the mods I have are:
SLP LT's
High Flow Cats
SLP Y-Pipe with factory O2's installed (all 4 original)
SLP Loud Mouth Cat Back Exhaust

30,100 miles on the car (using the original O2's still)

It would pass the emissions sniffer but the computer test is a different story.

It also passed the allowable noise limits. In other words at idle its not too loud for MA. WOT may be a different story.

I have DTC's, error codes:
P0135
P0137
P0141
P0155
P0161
P1133
P1153

All having to do with the O2's. Any idea how to get rid of these codes other then clearing the PCM? I'm pretty sure new O2's won't help because all 4 vary from about 65mV to about 800mV depending on throttle. Although S2B1, driver side post cat, only gets to about 65mV at idle. I cleared the codes with the scanner and will keep track of what comes back.

I know this questions has been asked but maybe not this variation.

What do people in Massachusetts do to pass inspection with LT's?
If I get LS1 Edit and eliminate the codes for the inspection will the computer still pass the test?
Anyone in MA that can lend a hand please do.

 

Ttt!!