Dang inspection!!!

[ozzie84]

Well the nox lowered on the last test i did, but everything else seemes like it got higher

[Strider]

I''m not sure if this has been covered but the EGR valve controls your Nox values by cooling down the combustion chamber when it opens up and lets exhaust gasses enter the intake.

[ozzie84]

If i dont pass the test tmrw, ill just wait and buy the timing kit and get an actual mechanic that knows the miata and get it over with

[jrj512]

an actual mechanic that knows the miata

His name, Stevan.

[ozzie84]

Switched out the cat, added the new plus and wires...but was to late to get the test done

Btw, the cat that was there seemed like it was completely gutted, nothing in there.

[ozzie84]

[BigDmiata]

Wow....that cat is toast.

[juxt3r]

Could always sell it as a "high flow" unit, of course...

[ozzie84]

Finally passed!!!!

[cwisenheimer]

Did you pin down the cause(s) of the failures?

[jrj512]

Hooray!

[ozzie84]

Honestly i think it was the cat, but did the timing belt water pump and brake fluid change before i took the test, and it passed with flying colors

[karter74]

Nope, definitely the brake fluid......

[Rob®]

I''m not sure if this has been covered but the EGR valve controls your Nox values by cooling down the combustion chamber when it opens up and lets exhaust gasses enter the intake.

I know he already fixed the issue, but FYI, there is no EGR valve on a '91.

[Strider]

I know he already fixed the issue, but FYI, there is no EGR valve on a '91.

Oh wow, I did not know that. Then you can only controle NOx with timing I guess.