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post #1 of 3 (permalink) Old 08-15-03, 12:42 AM Thread Starter
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EA 6CYL MPI Pipes & Hoses

Some questions for those who really know the EA 3.9L MPI engine as fitted to a 1989 S-Pak sedan....

1. On the thermostat housing, just above the coolant sensor, there is a white plastic sensor installed (climate control coolant sensor?). It has two small rubber hoses (vacuum) running off of it. There is a hose on the far left, one in the middle, then a plastic plug with no hose fitted.

Where is the middle hose supposed to run to?

Mine has the hose connected, but runs to nowhere, just left hanging with a white plastic vac hose connector on it and but I can't see where it is meant to be connected to.

The manuals are no help in this regard.

2. Coming out of the RHS of the firewall (looking from the front), up behind the washer reservior, are a bunch of electrical wires and two small plastic hoses, a couple of mm in diameter. One runs to the vacuum fitting on the inlet manifold; where is the other supposed to run to?

3. Lastly, on the RHS of the engine bay, there is a black hose running out from the wheel arch. It is a couple of cm in diameter, and is run along the top of the wheelarch (held by clips), the runs down to the area near the inlet manifold / heater valve.

What is it meant to do? It has a clean diagonal cut, so it looks like that is where it is meant to be; but what is it? Some type of drain pipe?

Hope someone can help.

maybe you can look at your own engine, and tell me what you see.

Cheers!
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post #2 of 3 (permalink) Old 08-15-03, 06:06 AM
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Re: EA 6CYL MPI Pipes & Hoses

1. Air con PVS valve Middle hose goes to mode switch -runs through firewall on passenger's (LH) side. Other hose connects to firewall end of inlet manifold - the short black one in 2.
2 See 1.
3, Cannister purge inlet tube - meant to be like that.

PVS Valve changes air inlet mode from fresh to recirculation when engine overheating appears imminent thereby reducing load on compressor and cooling system.

Regards Blue
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post #3 of 3 (permalink) Old 08-15-03, 10:11 PM Thread Starter
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Blue,

many thanks.

It seemed strange that the rubber hose fitted onto the thin plastic one via a white connector - but it does.

I should have picked up on that first time.

Thanks again! owe you one.
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