Tips to Pass Smog

Tips to Pass Smog
  • Back timing down to 8 degrees (any less is not legal)
  • Run hotter T-stat (192)
  • Full tune up w/oil change
  • Adjust idle to as close to 1000rpm without going over (950 is the best)
  • Have fuel inj professionally cleaned or use the below mentioned (Amzoil Power Foam)
  • Spray 1 full can of Amzoil's Power Foam in the throttle body while car is running
  • Double check to make sure your TPS is at .993-.995
  • Back fuel pressure down (around 30psi w/vacuum)
  • Run 2 oz of "RXP". Many mechanics at smog stations use this to pass customer cars.
  • Use 89 octane, higher octane burns slower and raises emmissons
  • Run 1 or 2 bottles of rubbing alcohol to a 1/4 tank of 89 octane

FYI, You do not have to do ALL these things at once, alot will depend on where you live and how strict the smog laws are, but out here in Calif which is know for it's very strict smog laws, I have found that doing items 1-10 let me fly by the limits producing numbers that are as good and sometimes even better than new 4 cylinder cars.



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