Ford V8 Discussion Discussion relating to getting the most out of your Ford-based V8 Miata's engine

Can your smog pump go bad?

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Old 08-25-2018, 10:25 PM
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Default Can your smog pump go bad?

Just wondering as put everything back on. My smog pump does not turn smoothly. Is that normal being a pump and all?
Old 08-26-2018, 06:36 AM
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Yeah, they do freeze up, especially if bypassed. The one on the engine that I bought was frozen solid.
Old 08-27-2018, 02:22 PM
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Get rid of the smog pump.
Old 08-27-2018, 07:09 PM
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Originally Posted by tbone heller
Get rid of the smog pump.
if I get rid of the smog pump. Will I be able to pass emissions?
Old 08-28-2018, 09:18 PM
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Originally Posted by baad88


if I get rid of the smog pump. Will I be able to pass emissions?
after some reading on here, I realize that passing emissions should not be a problem.
Old 08-29-2018, 01:09 PM
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Here in Georgia, it just has to have converters and pass the sniffer test and gas cap test. Luckily, mine is old enough to be emissions exempt.
Old 08-29-2018, 03:39 PM
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Jim - No smog pump on mine and passed Ontario emissions- which are less stringent for an engine changed car. Have an extra Speed density computer if you need it as I changed to mass air this year. Runs and idles better. Vic
Old 08-29-2018, 08:56 PM
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Originally Posted by fordified
Jim - No smog pump on mine and passed Ontario emissions- which are less stringent for an engine changed car. Have an extra Speed density computer if you need it as I changed to mass air this year. Runs and idles better. Vic
I figure I will probably have to go mass air route eventually.
Im going to get rid of the smog pump. What all can I remove with it? Also where do I get vacuum from for the brake booster?
Old 08-29-2018, 10:46 PM
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All vacuum comes from the upper manifold. Make sure to keep the little check valve in the existing Miata rubber line.
Old 08-30-2018, 09:17 PM
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Originally Posted by MX-Brad
All vacuum comes from the upper manifold. Make sure to keep the little check valve in the existing Miata rubber line.
where did you connect the brake booster. I have a vacuum line coming out the front of the upper manifold. Not sure where it is to connect.
Old 08-30-2018, 09:54 PM
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There should be a bunch of nipples to attach vacuum hoses to. FPR, brake booster, evap and other emissions use vacuum.
The Mustang may have had a vacuum tee mounted on the firewall, but you don’t necessarily need it as the plenum should have an abundance of nipples. I had to cap some of mine off as there were more than I needed even without the tee.
My brake vacuum hose is attached directly to the upper plenum where the tee normally attaches.

Here’s a good pic towards the bottom of the page.
https://foxbodyproject.wordpress.com...r-intake-swap/
Old 08-30-2018, 10:07 PM
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Thank you. I will be getting into that next week. Getting close to trying to start it.
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