I have an 88,305 tbi,great running motor,but i have high carbon monoxide readings,have failed three times,,,complete tune up,new cataliytic conv,,,had my plates suspended because of it,,
can someone out please help me,iam a newbie to this great site,iwas thinking of trying to run the engine on only one injector for the next test,think it might work?,,,

 

no it will not help.

now, post you results from the sniffer, knowing the hydrocarbons, no, and nox readings will help alot.

 

Move to the south man...no emmissions testing round here

 

I just passed NJ emissions yesterday, after going twice in the same day. The first time I went, I just started it up in the morning and went straight there, my NOx was 14, which is about 100 over. The HC was 173, and the CO was .56, both of which passing. Anyway, I went home and brought my timing from +4 to -2, and went back, hot engine, and my NOx was 930, and the other two were lower also. I can't imagine 6* of timing changed it that much, so just make sure your car is real good and hot, and doesnt have residual soot in the pipes when they test it.

 

thanks everyone for your input,,,the HC's are4.44,,,standards are 0.80 CO's are 49.8 standards are 15.0,,,,,maybe its the timing
have to check it again,,,,when you retard the timing do you turn the dist counterclockwise?,sorry but iam a newbie,,thanks

 

so you are failing on both HC's are CO?

 

no, your rotor spins clockwise, so to retard the timing (delay the spark) you will need to turn the distributor clockwise. You'll know you're going the right way if the engine speed slows down initially. Don't go too far or that could also make your emissions high. I have seen emission improvements as far as -6*.