1991 Saab 900 "emissions nox failure" Questions

...emissions failed for excessive NOx. Failure could also be themostat or O2 sensor. I do not have manuel for the car. post the readings. does the car overheat? NOX is caused by combustion temerature ...

...NOx emissions. High NOx readings are a clear sign of performance issues somewhere in the system. The question is, where?Among the potential causes of non-compliant NOx readings are:Misfire ...

NOx emissions test in Texas. Changed cat converter and egr contol valve. What should I look at next? All other checks are OK these cars are known to have injector failures and that would make you fail

emissions test for high NOx, pay close attention to the Catalytic Converter. Read about Catalytic Converter 4. High Engine Mileage - Over an engine's lifetime, carbon build-up develops in the engine's

...NOx gases form. EGR flow is controlled by the engine's computer, which opens or closes the valve as needed. The EGR system is, for the most part, in the "out of sight, out of mind" category, and ...

NOX smog rules. and is in warranty. all cars . for 8 years.80k or 15/150k, depend on car. but whichever first occurs so if over 80k do say so. the EGR can fail for many reasons. carbon blockage ro the

...NOX Oxsides of nitrogen which is usually over heating engine or EGR O2 (oxygen) leak in the exhaust Oh yea evap emissions where the fuel vapors escape into the atmosphere through a .020" hole in the ...

...NOx emissions. The Catalytic Converter, commonly referred to as the CAT is a component designed to continue the combustion process within itself and emit a more thoroughly burned and less harmful ...

...NOx gases form. EGR flow is controlled by the engine's computer, which opens or closes the valve as needed. The EGR system is, for the most part, in the "out of sight, out of mind" category, and ...