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External
Since: Jun 03, 2008
Posts: 1
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(Msg. 1) Posted: Tue Jun 03, 2008 9:36 am
Post subject: Smog Test - High HC at 15mph
Archived from groups: alt>autos>lexus (more info?)
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2000 Lexus ES 300, 65K miles.
60K service completed less than a year ago: new O2 sensors, knock-
sensors, filters, fluids, throttle-body cleaning, etc.
HC (PPM) @ 15mph (1578 RPM)
MAX/AVERAGE/MEASURED
51/9/49
HC (PPM) @ 25mph (2109 RPM)
35/7/7
Other results were good (CO, NO, O2 (0.0), CO2 (14.8/14.9)).
But it almost failed the 15mph HC test.
Could this mean the engine wasn't warm enough during the 15mph tests?
Or something more serious? |
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External
Since: Jul 26, 2005
Posts: 731
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(Msg. 2) Posted: Tue Jun 03, 2008 6:48 pm
Post subject: Re: Smog Test - High HC at 15mph [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Try a bottle of Chevron Techron Fuel System Cleaner next time. Use NGK
Iridium spark plugs. There isn't a lot of tune up you can do in modern
engines.
On Jun 3, 9:36 am, taxe....TakeThisOut@yahoo.com wrote:
> 2000 Lexus ES 300, 65K miles.
> 60K service completed less than a year ago: new O2 sensors, knock-
> sensors, filters, fluids, throttle-body cleaning, etc.
>
> HC (PPM) @ 15mph (1578 RPM)
> MAX/AVERAGE/MEASURED
> 51/9/49
>
> HC (PPM) @ 25mph (2109 RPM)
> 35/7/7
>
> Other results were good (CO, NO, O2 (0.0), CO2 (14.8/14.9)).
> But it almost failed the 15mph HC test.
> Could this mean the engine wasn't warm enough during the 15mph tests?
> Or something more serious? |
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