2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Brake booster hose and charcoal canister hose...

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Old Mar 28, 2006 | 10:58 PM
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From: Japanabama
Brake booster hose and charcoal canister hose...

Ok... just two things I want to find out as soon as possible.

First, where in the hell does the hose from the charcoal canister to the engine block plug in?

In the FSM/Haynes/various diagrams, it apparently plugs into a nipple near the oil filler... I can't find ANYTHING that looks like that. Maybe I'm looking in the wrong place?

Also, the hose that goes into the LIM from the brake booster is two hoses connected by a check valve, right? I can't seem to find the check valve or one of the hose peices... since just the one peice isn't nearly long enough to reach the nipple...

I know those valves cost a fortune from Mazda (well, 32 bucks), but I could have sworn someone said you could get them cheaper than that...
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Old Mar 28, 2006 | 11:31 PM
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From: Kicking down doors in a neighborhood near you
I believe the check valve is inside the hose. I have a friend that threw the hose away and replaced it with a regular rubber hose because he didn't know there was a valve in it. So if I remember correctly, you won't see the valve cause its in the hose.
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Old Mar 29, 2006 | 01:09 AM
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Originally Posted by Valkyrie
First, where in the hell does the hose from the charcoal canister to the engine block plug in?
There's a 6mm nipple on rear of the engine's centre plate near the base of the oil filler neck.

Also, the hose that goes into the LIM from the brake booster is two hoses connected by a check valve, right?
The check valve is inside the hose. Squeeze along it's length until you find it. There's usually a paint dot showing its location.
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Old Mar 29, 2006 | 01:24 AM
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"First, where in the hell does the hose from the charcoal canister to the engine block plug"

I'm not certain, but if i'm correct, a hose starts at the gas tank vent, goes to the charcoal canister, then to the nipple just behind the oil fill neck... not sure if thats even right.

"Also, the hose that goes into the LIM from the brake booster is two hoses connected by a check valve, right? I can't seem to find the check valve or one of the hose peices... since just the one peice isn't nearly long enough to reach the nipple..."

Mine has a visible plastic check valve near the booster... maybe its not the original hose though.

Last edited by t-too; Mar 29, 2006 at 01:36 AM.
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Old Mar 29, 2006 | 04:11 PM
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From: Japanabama
I think I found the nipple for the charcoal canister, BUT, I can't see it because of the wiring harness, and there's no way I could get to it without taking half my longblock apart... crap...

So, the vacuum hose that goes to the brake booster nipple isn't a two-peice hose? Because my hose is waaaay too short.

It's basically an S-shaped hose that's about 6 inches long (if it was streched), right? If it was 2-3 inches longer it would reach just fine...
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