[Supras] Help me pass the smog test please

[Hacker J]

Assuming that first column is CO2, then I calculate that you are running lean.
15mph A/F = 16.887
25mph A/F = 16.602

You can't be running closed loop with those numbers.  Check for codes. I would suspect a vacuum
leak although the ECU should be able to compensate for most small ones. If the O2 sensor was bad
it should run slightly rich, but if the O2 sensor was bad and you had a vac leak you might get
these numbers.  Is this a stock setup, or is there a Lexus MAF in the equation.  

Wouldn't hurt to check your Vf voltage as well. If its running open loop it should read 0V.

Jon


--- supras-request at supras.com wrote:

> 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




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