Dreaded SAI/Evap monitors Not ready and P0442

[kk2002s]

Originally Posted by boxfix

I had the same problem and it turned out to be a huge vacuum leak.

Did you guys have CEL codes?
Or
You went to inspection and Oh Oh 'Not Ready'
Seems with such a large vacuum leak you would get a Code
I have cat delete pipes. Could that cause a difference in the monitors setting? They are after the O2 post cat sensors but!!!

[Gelbster]

Originally Posted by kk2002s

Did you guys have CEL codes?
Or
You went to inspection and Oh Oh 'Not Ready'
Seems with such a large vacuum leak you would get a Code
I have cat delete pipes. Could that cause a difference in the monitors setting? They are after the O2 post cat sensors but!!!

Cat Delete pipes can cause many codes and fuel trim problems.Suggest you research using antifoulers/extenders or some other hack to keep the DME 'happy'
IN ca your changes would cause you $$$$$ or problems at Smog Test time.Be careful

[boxfix]

Originally Posted by kk2002s

Did you guys have CEL codes?
Or
You went to inspection and Oh Oh 'Not Ready'
Seems with such a large vacuum leak you would get a Code
I have cat delete pipes. Could that cause a difference in the monitors setting? They are after the O2 post cat sensors but!!!

I have a Durametric so I can just use that to see if the monitors are ready. It has a READY menu and it shows the status of the five monitors.pass.....or fail.

[kk2002s]

Update to this long story.
After removing Plenum tubes to see if there was something obvious, it became apparent this was going to be a lot of removing, buying more diagnostic equipment, swapping parts and weeks of frustration.
So I found a local inde shop. They found that the evap canister, purge and vent value were faulty.
They were also able to see my old P0442 code.
Driving home the Evap monitor set to complete but the SAI still did not. The shop indicated that in NJ like CA the car can still pass with 1 still not complete. So I took a chance went straight to the inspections station and YES passed. I actually threw my hands in the air and yelled YES in the inspection station.
I would probably still be throwing parts at it now if I was trying to diagnose. I also know now to watch these monitors way before inspection.
Still unclear as to the sequence SAI first or Evap first or maybe independent. I still need some more cold starts to see if the SAI sets
2 years until the next inspection