[Supras] Help me pass the smog test please

[Bigmacz28 at aol.com]

Also make sure you have a new air filter!
 
 
 
In a message dated 4/20/2008 7:32:10 A.M. US Mountain Standard Time,  
supraman88 at verizon.net writes:

When was  the last time you replaced plugs and wires? Mine was failing 
miserably  until I did a 'tune up'.

Set the timing according to spec, and do the  plugs and wires. I got NGK 
wires (what the factory uses) for $56 on eBay a  year ago, and 
Nippon-Denso plugs. Everything came into spec, but NOx is  high. 
Retarding the timing would help that.

The reason the timing  was showing at 8 degrees is because of the vacuum 
advance controlled by  the ECU. If you short terminals T and E1 in the 
diagnostic terminal under  the hood and check it, it should be 10 
degrees. Remove the jumper and it  will go to 8.

>
> I failed my smog test and need help.   Any advices
> would be appreciated.
>
> Here are my test  results for California ASM Test:
>
> Car is an 86.5 Supra  Non-Turbo 3.0 Liter
>
>
>          %CO    %O2    HC IN PPM...........    CO IN  %.............    NO
> IN PPM...........       
> TEST    RPM    MEAS     MEAS    MAX    AVE    MEAS     MAX    AVE    MEAS   
 MAX     AVE
> MEAS    RESULTS
> 15mph    1646   12.0    3.2    130    41     189    0.81    0.13    0.51    
 1115    399
> 1505    Fail
> 25mph   1786    12.6    2.7    105     29    105    0.61    0.11     0.25   
 945    332
> 479    Pass
>  Ignition Timing 8 BTDC on the smog report.
> MAX=Maximum allowable  value
> AVE=Average emissions for passing vehicles
> MEAS=Amount  measured
>
>
>
> When I asked the smog technician if  my timing is off
> he said that I shouldn't expect 10 BTDC since  it
> changes according to 
> engine to different conditions.   Is he right?  I
> thought it's supposed to be 10 BTDC at idle  according
> to the factory specification in the TSRM manual.   Who
> is right?  I looked thru all my older previous smog
>  reports and I saw that it jumped all around from 9
> BTDC, 13 BTDC, and  10 BTDC but they all passed the
> smog tests till now.  So does the  timing has any major
> effect?
>
> Thanks in  advance,
>
> Liam N
>    



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