Failed Smog - Gross Polluter - Now What?
07-11-2011, 12:20 PM
#21
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smog
let me start out by saying i apologize for high jacking this thread. I am brand new on Yotatech and they wont let me start my own thread untill I post 15 times on someone elses thread. I have a 95 runner 3.0 and it wont produce enough power to pass the smog test, when it is timed correctly. I currently keep it timed 7 degrees advanced and it runs great. I was thinking maybe the timing belt was worn, any suggestions. Again I apologize for the high jacking
07-11-2011, 08:21 PM
#23
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smog
so i keep it at 17 degrees (7 degrees past) and yes at 10 degrees it dosent have enough power to keep the tires rolling at 15mph needed for the smog test. The tech gives it alot of gas to get it going then brings it down to 15mph and it dies
07-11-2011, 09:56 PM
#24
Registered User
so my 82 22r failed smog at idle today.
heres the numbers...
first test
HC
max GP Measured
250 350 676
CO%
max GP Measured
2.00 3.50 6.01
second test after some adjustments
HC
max GP Measured
250 350 361
CO%
max GP Measured
2.00 3.50 4.01
at 2500rpm it is perfect
hc
max gp meas
200 400 60
co%
max gp meas
2.00 3.50 0.05
recently rebuilt carb. replaced almost all the vacuum lines. was running premium fuel, recent oil change and spark plugs.
any ideas what to check or change to make this thing pass? im open to all ideas
thanks!
heres the numbers...
first test
HC
max GP Measured
250 350 676
CO%
max GP Measured
2.00 3.50 6.01
second test after some adjustments
HC
max GP Measured
250 350 361
CO%
max GP Measured
2.00 3.50 4.01
at 2500rpm it is perfect
hc
max gp meas
200 400 60
co%
max gp meas
2.00 3.50 0.05
recently rebuilt carb. replaced almost all the vacuum lines. was running premium fuel, recent oil change and spark plugs.
any ideas what to check or change to make this thing pass? im open to all ideas
thanks!
1stgenboy
09-14-2011, 10:58 AM
#30
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Join Date: Aug 2011
Location: Seattle,WA
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I had really high emissions and it was due to an exhaust leak ahead of the oxygen sensor. It was pulling in clean air and the O2 sensor thought it was running lean so it started dumping fuel.
10-21-2011, 09:26 PM
#31
Registered User
How DO you change the timing? The only thing i can think of is physically moving the chain over a tooth.. Which would be way off. I did notice an adjustment on the distributor cap, as well as the fanned-slotted bracket that fixes the distributor to the block... But honestly I have little experience tuning a carburated motor.
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