its prolly ur MAS

A MAS reading too little air could make the engine lean, or a clogged fuel filter, bad injector or fuel pressure reg, old O2 sensor, or EGR valve that's kaput. Those are just quick suggestions. Possibly a bad plug or plug wires also.

I beat you!!!! I failed inspection two weeks ago for high NOx. It was 2016!!... and that was with new wires and plugs, a cleaned out throttle body, totally clean and perfect EGR, a cat that's less than two years old, and a bottle of 'super-duper emissions helper' stuff dumped into the fuel tank!!! I need to get it down to 1088 to pass.
Also, my CO% read 0.78 and the limit to pass is 0.79!!!! [A real squeeeeeeker!!]

What's my next step??

Yes but I did a retest cold 2312 co% 0.01 hc ppm 12 #### tire is replacing thermo valve + purge engine they say there is carbine deposits cost $400cnd this better work!!!!! wow 1088 to pass here it 501 NOx to pass.

P.S I don't thik a 92 non turbo has a mas sensor I might be wrong I think they came in the 2g cars?

Limits to pass in Ontario Canada (HC pm 67) (CO% 0.37) (NOx ppm 501) hell I might move to NJ New York.

Hey laserblue question do you have a stock manifold? take off your heat shield and check for cracks. P. you made me pull out my dictionary. Dam no spell check here.

Here is the 1st 2nd and 3rd e test

1st

I will post the 3rd tomorrow

Emission standards are more strict for '92s than '91s, but still Canada seems outrageously tight on their #s!!
Yes, I have stock everything.
I'm letting a mechanic look at the car so that I can be ripped off accordingly... to pass [I hope]!
ps... You blew it --> "Dam" is "Damn"!! No prize for you!!!!!

Check that the EGR valve is operating properly. If not, it could cause very high NOX emissions.

Chris

Thanks that item is $250 cnd dealer only.

Yes, the primary cause for high NOx is a faulty EGR, but mine is doing fine and the reading is still twice the limit!

NOX emissions are a result of high temperatures in the combustion chamber. The EGR valve works to reduce combustion temps by recirculating exhaust gases back into the intake. This seems counter-intuitive, but the introduction of an inert gas into the combustion chamber effectively lowers combustion temps by a good deal. So if the problem is not with your EGR valve, it's likely caused by carbon deposits in the engine which retain heat between each combustion. Use some Mopar Combustion Chamber Cleaner (not hard at all) to remove the carbon from your piston tops.

How are your coolant temps? Are they higher than normal when idling?

Chris

ooops didnt kno it was a nt, and some guy corrected me not long ago, and told me that all turbo DSMs hav the MAS

Temp is normal, just like always. A mechanic told me that high cylinder temp causes NOx to increase... and said that carbon build-up may be the problem. I'm glad you confirmed this!!
Is this cleaner stuff really easy to use [as in little or no tools and ability - 'cause that's me!]?

NOx now 306 yes Laserblue does your car have a thermo valve or is that just Canadian models replace that mine went from 2300 to 306 also it would'nt hurt to clean carbon deposits.

3rd test

New termo valve + carbon clean yes check out these numbers

4 th test

What is a thermo valve??

What and where is a thermo valve?? Canadian model only, I guess. Mines good ol' USA model.

In the haynes manual the thermo valve 1991 and later Federal ad Canada 2.0L non turo engine.