Question about Toyota Corolla
Just add a good injector cleaner.Then get the engine at normal running temp before.Be sure you have a clean air filter fitted.Then that should be fine.
Posted on Sep 01, 2009
This indicates a rich mixture, it can be caused by any number of things.
1. Dirty engine oil
2. Sludge in throttle body and idle air bypass valve
3. Defective catalytic converter
4. Possiable defective fuel injection parts such as dirty fuel injectors, worn out O2 sensors, defective MAF sensor.
As you can see there is no easy answer, I was a smog tech for over 30 years, I saw every kind of part cause your issue, even a defective engine cooling fan.
Posted on Jul 29, 2008
I have a 94 Tbird with a reading of 790 NO ppm at 1871 RPM, I put about a liter of water into the intake at about 2000 RPM and changed vacum lines to EGR valve,(may have been cracked), now the reading is only 214 NOppm at 1348 RPM. This much change I don't understand. Maybe this info may help someone.
Posted on Sep 17, 2009
have you had the the engine codes pulled and reset?
and if so what are your engine codes?
i dont know of any car that will pass emissions test with the engine light on.
we cure your trouble that caused your engine light to come on and you will pass your test.
Posted on Nov 24, 2008
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Posted on Jan 02, 2017
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