[DML] Re: catalytic converter question

["rendycheng" <rendycheng@xxxxxxxxx>]

David,

Thanks for such detail explanation.   I think the things I have not done are the valve 
adjustment, compression test, injector test.

thanks again.

rendy

> OK, here is a plan of attack:
> Have the fuel injectors tested and cleaned
> Replace the seals on them
> Go over ALL the vacuum hoses for ANY vacuum leaks
> Check the initial timing and the vacuum and mechanical advance
> Make sure the plug over the mixture screw is not leaking vacuum
> Wipe the venturi (throat) of the air sensor and plate and make sure it
>      moves freely and is centered
> Make sure the ignition wires are in GOOD condition and regap the spark
> plugs
> Shake the air filter and if it is dirty replace it
> Replace the O2 sensor, reset the Lambda counter and check the intake
> and exhaust valves for clearance.
> Mkae sure the Lambda system sysetm is functioning properly.
> Do a compression test, they should be within 5% of each other and over
> 100 psi
> Get rid of the 87 octane and put 91 or higher in for the test
> Drive it for a while to clear out the converter before you go for
> another test. If it hasn't been overheated from all the HC it should
> be alright. When a "D" is set up correctly you can pass even with a
> hollowed out converter in most States. You should also make sure the 3
> brass screws are closed and the motor is running on the idle system.
> This is a lot of work but I don't know if the previous work was done
> "right". For instance a 30,000 mile service is SUPPOSED TO include an
> O2 sensor and a valve adjustment. You might also need a distributer
> cap and rotor and a fuel filter. Maybe even an oil change and filter.
> Yes, it could affect the emmisions if it needs an oil change or is
> overfilled with oil. You should also make sure the cooling system is
> working right. If the thermostat is stuck open or the fans run all the
> time the motor could be running too cool which increases emissions.
> David Teitelbaum
> vin 10757
> 
> 
> 
> --- In dmcnews@xxxxxxxxxxxxxxx, "rendycheng" <rendycheng@xxxx> wrote:
> > ## This is from the original poster ##
> > 
> > Here is the complete info on my smog test:
> > 
> >  RPM=2292 (at 15mph)
> >  HC_MAX = 141 HC_GP=331 HC_MEAS = 161
> >  CO_MAX = 0.99 CO_GP=2.49 CO_MEAS=0.66
> >  NOX_MAX = 1148 NOX_GP = 2270 NOX_MEAS = 2211
> >




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