[Supras] Help me pass the smog test please

[supraman88]

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
>