Can your smog pump go bad? - v8 Miata Forum - Home of the v8 Miata Conversion

Aug 25, 2018 | 10:25 PM

baad88

Thread Starter

V8 Miata Fan

Joined: Apr 2017

Posts: 69

Likes: 3

From: Kitchener Ontario

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?

Aug 26, 2018 | 06:36 AM

jrmotorsports55

V8 Miata Fanatic

Joined: Aug 2014

Posts: 634

Likes: 15

From: Seven Hills, OH

Yeah, they do freeze up, especially if bypassed. The one on the engine that I bought was frozen solid.

Aug 27, 2018 | 02:22 PM

tbone heller

V8 Miata Zealot

Joined: Mar 2010

Posts: 1,220

Likes: 51

From: Canton, Georgia

Get rid of the smog pump.

Aug 27, 2018 | 07:09 PM

baad88

Thread Starter

V8 Miata Fan

Joined: Apr 2017

Posts: 69

Likes: 3

From: Kitchener Ontario

Quote:

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?

Aug 28, 2018 | 09:18 PM

baad88

Thread Starter

V8 Miata Fan

Joined: Apr 2017

Posts: 69

Likes: 3

From: Kitchener Ontario

Quote:

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.

Aug 29, 2018 | 01:09 PM

tbone heller

V8 Miata Zealot

Joined: Mar 2010

Posts: 1,220

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From: Canton, Georgia

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.

Aug 29, 2018 | 03:39 PM

fordified

V8 Miata Noob

Joined: Jan 2015

Posts: 3

Likes: 0

From: Toronto

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

Aug 29, 2018 | 08:56 PM

baad88

Thread Starter

V8 Miata Fan

Joined: Apr 2017

Posts: 69

Likes: 3

From: Kitchener Ontario

Quote:

Originally Posted by fordified

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?

Aug 29, 2018 | 10:46 PM

MX-Brad

V8 Miata Fanatic

Joined: Mar 2014

Posts: 635

Likes: 37

From: SW Ont.

All vacuum comes from the upper manifold. Make sure to keep the little check valve in the existing Miata rubber line.

Aug 30, 2018 | 09:17 PM

#10

baad88

Thread Starter

V8 Miata Fan

Joined: Apr 2017

Posts: 69

Likes: 3

From: Kitchener Ontario

Quote:

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.

Aug 30, 2018 | 09:54 PM

#11

MX-Brad

V8 Miata Fanatic

Joined: Mar 2014

Posts: 635

Likes: 37

From: SW Ont.

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/