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Car Forum / Driving, Maintenance, Tuning / Maintenance and Repair / June 2006SMOG pump???
I have a 1982 Mercury Marquis 302 5.0 engine. My smog pump has locked up.... Is it needed??? > I have a 1982 Mercury Marquis 302 5.0 engine. My smog pump has locked > up.... Is it needed??? It all depends on.......how tough your state is on vehicle emission testing. In some states a visual will cause you to fail. Some states have no yearly safety or emission testing at all. Legally, yes you need it. I live in FL so it isn't a huge concern.... How visual is it? Does it make it look like a smoke factory is in your trunk??? No what he means is they look under the hood, see no belt on it and fail you. All a smog pump does is shoot fresh air into the exhaust manifolds when you drop the throttle. That sudden shot of air causes any hot hydrocarbons that weren't burned in the cylinder to spontaneously ignite, lowering HC emissions...  Signaturejeffcoslacker http://www.automotiveforums.com >No what he means is they look under the hood, see no belt on it and fail >you. [quoted text clipped - 3 lines] >hydrocarbons that weren't burned in the cylinder to spontaneously >ignite, lowering HC emissions... Actually, the air gets diverted away from the exhaust when you drop the throttle to prevent backfire. hardriverror <me@privacy.net> wrote in article <8ib092pk05brq2t9tr2ao3415o4a3kapca@4ax.com>... > >No what he means is they look under the hood, see no belt on it and fail > >you. [quoted text clipped - 6 lines] > Actually, the air gets diverted away from the exhaust when you drop > the throttle to prevent backfire. Obviously two different representations of the term, "....drop the throttle." 1.) Drop The Throttle....Slang. Drop the hammer. Accelerate quickly. Push the accelerator pedal to its lowest point, "dropping it" closer to the floor....IOW acceleration. 2.) Drop The Throttle.....Let go of the throttle allowing it to return to idle....IOW deceleration. The A.I.R. (Air Injection Reactor - not SMOG) pump injects air into the exhaust system to burn any un-burned hydrocarbons. If it were allowed to continue injecting air on deceleration, the additional hydrocarbons coupled with the injected air would produce backfiring, so the high manifold vacuum created during deceleration is used to divert the air away from the exhaust system on deceleration. |
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