Wrapper

<hannaari@optonline.net> wrote in message
news:1154892699.623845.5330@n13g2000cwa.googlegroups.com...[color=blue]
> Dear Ray,
>
> Yes I did not fail because of low NOx, I failed becuase of high HC and
> CO, I am located in New Jersey. and my plugs and wires are original
> from Toyota dealer, also forgot to mention I replaced the Distributor.[/color]

Hydrocarbons (HC) are unburnt fuel, and so high HC means high amounts of
unburnt fuel, either because the fuel is not burning completely or the
mixture is too righ - that is, the fuel ratio is too high for the amount of
air

High Carbon Monoxide (CO) comes from a fuel mixture that is too rich.

The combination of high HC and CO could be caused by a misfire - one or more
spark plugs are are not firing; incorrect ignition timing, or a righ fuel
mixture.

How does the engine run at idle? Does it run smoothly? Does it idle
normally or fast after it is warmed up?

Why did you replace the distributor? How long ago was it replaced?

What is the condition of the air filter? If you shine a light through it,
can you see light?

What is the condition of the black plastic tube between the air filter and
the throttle body? Is it free of cracks or
holes or leaks where it connects to the air filter housing or throttle body
housing?

A competent technician or your Toyota dealer can also check O2 sensor
operation since it controls the air/fuel mixture.

--

Ray O
(correct punctuation to reply)
[color=blue]
> Ray O wrote:[color=green]
>> <hannaari@optonline.net> wrote in message
>> news:1154805828.910978.13350@i42g2000cwa.googlegroups.com...[color=darkred]
>> > Please help,
>> >
>> > My 92 Camry V6 3.0 has failed emission test twice for the same resaon,
>> > which is low HOx/252 ( standard should be around 937) and high HC/180 (
>> > standard should be around 124) and high CO%/3.52 ( standard should be
>> > around 0.69). Prior to emission test I have repaird the following
>> > I have new Timing belt, spark plus, wires, 2 main belts, radiator,
>> > radiator cap, water pump, thermostat, power steering pump, power
>> > streering high pressure hose, lower engine mounts, sway bar bushing,and
>> > PVC valve
>> >[/color]
>>
>> Where are you located?
>>
>> I have never heard of HOx. Assuming you mean oxides of nitrogen (NOx),
>> your
>> vehicle did not fail because of low NOx because lower is better.
>>
>> The high HC and CO could be caused by an ignition system misfire, which
>> could be related to the spark plugs and spark plug wires you recently
>> replaced. Did you use OEM spark plugs and wires? If not, I would start
>> by
>> using OEM plugs and wires.
>> --
>>
>> Ray O
>> (correct punctuation to reply)[/color]
>[/color]