Tultu asked:


I would like to know what is going wrong and why? How to correct this problem?

Troubleshooting Trane Heat Pumps

No Responses to “My Toyota car fails smog test due to excessive emission of NO gas. Can any one tell me what is going wrong ?”

1. Badboy Mikey`s back! © on January 20th, 2010 6:17 am

   An analyserthe computer will have stored info on an analyserthe computer will have stored info on an analyserthe computer will have stored info on.
   An analyserthe computer will have stored info on an analyserthe computer will have stored info on what`s wrong.

2. joey v on January 23rd, 2010 6:02 am

   could be your cat try replacing that first.

3. krazykritik on January 24th, 2010 12:43 pm

   What type, year, engine, air conditioning, where do you live, etc..cuz if you’re in California it can be something pretty minor that could make it fail as their pollution control laws are nuts out there.

   Clogged catalytic, faulty oxygen sensor, a/c issue, plugged pcv valve, bad spark plug, malfunctioning vacuum valve, transmission modulator valve problem, improper timing setup, clogged injectors, dirty fuel, etc..etc..so we need a little more info if we’re to give you sound advice in here, okey dokey?

4. Carman Nguyen on January 25th, 2010 1:40 am

   Catalytic converter,EGR valve operation are most common.