ParadiseMJ Posted April 30, 2014 Share Posted April 30, 2014 Hey guys, Going to get the ol' boy smogged and looking for suggestions...last minute type. I have a relatively new cat, new plugs, rotor, cap etc. I fixed all my vac lines, checked the EGR function, new cap, new gas. Anything I'm leaving out? Link to comment Share on other sites More sharing options...
shelbyluvv Posted April 30, 2014 Share Posted April 30, 2014 Get the cat HOT before you take it in. Run it down the highway with the OD off and keep the revs up for about 15 mins. Then get it to the smog shop before it cools off. They seem to pass easier with the cat hot. Link to comment Share on other sites More sharing options...
jpdriver1 Posted April 30, 2014 Share Posted April 30, 2014 what's the vintage of your O2 sensor also check for tight manifold bolts -- if it is sucking air, your NOX may fail been trying for three weeks to get my 89 to pass Link to comment Share on other sites More sharing options...
johnj92131 Posted May 1, 2014 Share Posted May 1, 2014 Just had my 91 smoged last Monday. Only problem was the gas cap. Replaced the gas cap and I passed with flying colors. It has been the same every time I have to do the smog thing for the last 7 or 8 years. The engine is bone stock and runs just fine on regular gas with about 250,000 miles. Link to comment Share on other sites More sharing options...
ParadiseMJ Posted May 1, 2014 Author Share Posted May 1, 2014 Well, all the sniffer tests came out fine, great actually. Gas cap, fine. EGR, working good. I previously had a CARB approved intake on it. I took it off to smog it since it isn't stock. I failed the visual check because the chintzy little $2.00 heat tube and passive tin collector (Renix) on the manifold for the vacuum actuated "Thermostatic Air Filter" had also been removed. So it failed just on that alone. It has passed every other time just as it is. Different tech, by the book. They didn't charge me. I called the shop and gave them the number on the aftermarket intake tube...they OK'd the tube (deleting the stock intake air box) and told me to put it on and bring it back. Even with the stock box out and the TAF and the vac line to the airbox removed. Link to comment Share on other sites More sharing options...
ParadiseMJ Posted May 2, 2014 Author Share Posted May 2, 2014 Passed with the aftermarket intake, an explanation to the smog man on HOW the "Thermostatic Air Filter" works, very good emissions numbers and my plain old annoying-ness. I think they just wanted to get rid of me. Link to comment Share on other sites More sharing options...
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