Help with part

StanTheMan · Postby **StanTheMan** » Thu May 24, 2018 9:33 am

Can anyone help me with this?

It is on a 98 NB8A going into a 89 chasis.
Its attached to various vacum points on the intake plenumn

Does it attach to the engine or chasis.
Is there a electronic connector required for this?

Is it rewuired for a 1.8 transplant?

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Roadrunner · Postby **Roadrunner** » Thu May 24, 2018 10:06 am

It is a 3 way valve, the little cap with a Mitsubishi logo on it is actually an air filter.
I believe there is one mounted to the back of the intake manifold. Not sure what it actually does, it's right next to the EGR valve from memory so possibly EGR related, but I can take a look when I get home to see where the hoses run.

Lokiel · Postby **Lokiel** » Thu May 24, 2018 10:10 am

If no-one else can help, get yourself a beverage, find a comfy chair and troll through: http://www.mellens.net/mazda/Mazda-Miata-1999-2001.pdf

StanTheMan · Postby **StanTheMan** » Thu May 24, 2018 10:15 am

The hoses are connected. Im confident the are in the correct place. If it attaches at the back of the manifold. There must be a bracket im missing. If you have the time. If you could take a pic some time

Roadrunner wrote:It is a 3 way valve, the little cap with a Mitsubishi logo on it is actually an air filter.
I believe there is one mounted to the back of the intake manifold. Not sure what it actually does, it's right next to the EGR valve from memory so possibly EGR related, but I can take a look when I get home to see where the hoses run.

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hks_kansei · Postby **hks_kansei** » Thu May 24, 2018 11:14 am

If I remember correctly it's the purge valve for the fuel evap system (charcoal canister)
Either that or the EGR, cant remember sinec both sit right next to each other.

The actual solenoid however mounts onto the wheel arch on the driver's side, on a gold/brass coloured bracket.

I'll try and find a pic.

edit:

Evap system purge valve. (Purge solenoid valve in the diag)

hks_kansei · Postby **hks_kansei** » Thu May 24, 2018 11:35 am

I should add, on the NB8A the "charcoal canister" or Evap can, has 3 ports.

One is an input from the fuel tank, where excess vapours go into the canister.
The other is a vent port, which vents to atmosphere (factory it goes down to a hole in the subframe)
The third is the purge line, which runs from the charcoal canister, to the valve shown above, and then to the intake manifold (from memory just near the throttle body)

Essentially the canister collects vapours, and under certain conditions that little valve opens and lets the intake manifold vacuum suck the vapours into the engine to be burned off.

I think the other vent, that leads to atmosphere, is mainly just a safety thing, so that if somehow the canister starts to fill up more than it can purge it can vent excess vapours/fluid underneath the car, instead of into the engine bay with all the hot burny bits.

(also worth noting, Aussie ones were different to the yanks. Their NB8A didnt have the atmosphere vent, theirs only had 2 ports)

StanTheMan · Postby **StanTheMan** » Thu May 24, 2018 5:50 pm

Thanknks for that. Looks like i have no way of controlling that. So ill just leave it as is.
Just bolt it down securly

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hks_kansei · Postby **hks_kansei** » Thu May 24, 2018 5:58 pm

If you're not using the factory ECU, and wont be wiring it in, just remove the solenoid all together and just put a vac cap on the ports where it joined up (one on the intake mani, one on the charcoal canister)

StanTheMan · Postby **StanTheMan** » Thu May 24, 2018 6:28 pm

hks_kansei wrote:If you're not using the factory ECU, and wont be wiring it in, just remove the solenoid all together and just put a vac cap on the ports where it joined up (one on the intake mani, one on the charcoal canister)

Its going into a NA6 chasis....
Ill have a closer look in daylight.
If i can dicard it even better

Will be using MS2. May have to resort to NA6 ecu

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Lokiel · Postby **Lokiel** » Fri May 25, 2018 1:50 pm

MS2 wont be controlling either solenoid unless you go out of your way to implement your own control of these so just discard them and cap the barbs - that's what I did on my MSM with both the Adaptronic and then MS3 ECUs (The fuel tank vapour line just has a rubber tube connected tht follows a U-shape with the open end pointing traight down to vent the fuel vapours - I can't even smell fuel despite the fact that the garage usually has the garage door down most of the time)