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Old 06-09-2020, 03:38 PM   #5
truckin 79
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Join Date: Jun 2014
Location: CO
Posts: 775
Re: Another smog thread

I left all of my smog stuff there in 79 truck just in case I have to pass emissions in CO again. I bypassed all the thermal vacuum stuff by thermostat housing. I have constant vacuum to exhaust stove pipe so it is open all the time. I also kept vacuum to transmission modulator as well. I have vacuum to EGR right now but plan to plug that off as well. I have vacuum for distributor but I am planning on putting a Mallory distributor with no vacuum canister. I have a Mallory Comp 9000 on Trans Am with vacuum canister and it runs great. I do not have vacuum to thermac on air cleaner either but with a properly operating choke and have not had any cold weather starts. I did pass emissions with the current set up with the help of a AEM wide band sensor from Ebay. So all the smog stuff is not really necessary in my opinion. I did keep the catalytic converter though figured it will not hurt anything.
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79 Chevy 2wd BIG10 350 TH400
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