1984 Euro Tercel 4WD Wagon

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Petros
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My tercel:: '84 Tercel4wd w/extensive mods
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Re: 1984 Euro Tercel 4WD Wagon

Post by Petros »

if you pull the vac line from the AAP you should not see fuel leaking out of the vac line, but it could be wet with fuel. The engine vacuum sucks the fuel into the intake manifold, but when not running it can not flow through the line. though you may not see much fuel when you pull off the line, so it is a simple test to cap it off and run without the AAP engaged.

But if you pull the vac line and it is wet with fuel, the AAP is ruptured, and needs to be replaced. this can be done without removing the carb, but a quick fix is to just cap off the vac lines on both ends.

I think the need for it is that the fuel system is designed to run fairly lean, even during cold start. Running lean means it will cough and sputter when you try to accelerate when it needs more fuel. The AAP it is to eliminate the flat spot that occurs with a cold engine. there is not enough of the fuel vaporizing when it is cold, so extra fuel is required to make it so it will not have the flat spot. After warm up, more of the fuel enters the combustion chamber as a vapor allowing for more efficient and complete combustion.
'87 Tercel 4wd SR5 (current engine swap project)
'84 Tercel 4wd (daily driver, with on going mods)
'92 Mazda MPV 4wd (wife's daily driver)
'85 Tercel 4wd DLX auto(daughter's daily driver)
'01 Honda Civic (other daughter's daily driver)
FRQ
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Re: 1984 Euro Tercel 4WD Wagon

Post by FRQ »

Passed tech inspection yesterday with some margin to spare with regards to emissions. 8) The AAP line was indeed lightly wet with fuel, I capped it off and just before testing pulled a few vacuum lines for good measure, but I suspect the AAP was the only culprit. Replacement looks easy enough if the air filter housing is removed.

Otherwise the little Tercel passed with flying colors. I do need to fix the hazards, those don't work. Blinkers work fine, so I hope it's the switch or fuse and I won't have to go digging around under the dash for the blinker relay.

Same goes for the choke, that doesn't engage at all. I hope it's an adjustment issue with the linkage, will have a deeper look once the air filter housing is off to replace the AAP membrane.
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NWMO
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Re: 1984 Euro Tercel 4WD Wagon

Post by NWMO »

Good to hear!
Psalm 37:4 "Delight yourself in the Lord and he will give you the desires of your heart"

In remembrance of my friend ARCHINSTL:

T4WD augury?
"Oh, do not ask, 'What is it?' Let us go and make our visit."
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"Now and then we had a hope that, if we lived and were good, God would permit us to be pirates."
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FRQ
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Re: 1984 Euro Tercel 4WD Wagon

Post by FRQ »

I've tried to remove the steering column shroud today, but the top half of the plastic steering column clamshell seems to be impossible to remove without removing the steering wheel. Before I delve into that and risk damaging the very brittle plastics, is there a known issue with the hazard switch on these cars?

From what I can tell, it seems to be integrated into the blinker/wiper stalk assembly. I have blinkers, but no hazards. The 15A fuse in the engine compartment (hazards/horn) is fine, so I'm wondering what the most obvious culprit might be. The horn works as well.

Since the blinkers work, I assume the relay is working fine. Any thoughts? :?:
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NWMO
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Re: 1984 Euro Tercel 4WD Wagon

Post by NWMO »

Did you check the fuses in the kick panel? I don’t know wjich fuses land where, so I always check both locations.

Chris
Psalm 37:4 "Delight yourself in the Lord and he will give you the desires of your heart"

In remembrance of my friend ARCHINSTL:

T4WD augury?
"Oh, do not ask, 'What is it?' Let us go and make our visit."
T.S. Eliot - "The Love Song of J. Alfred Prufrock"

"Now and then we had a hope that, if we lived and were good, God would permit us to be pirates."
Mark Twain
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rer233
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Re: 1984 Euro Tercel 4WD Wagon

Post by rer233 »

Are ALL the fuses good- blinkers only work with key on but flashers should work with key on or off. Just a thought-good luck!
if it aint there, there's a good chance it won't break!
83 SR5 Silver/Blue (Snowmobile/work beater)-totaled but drivable
85 SR5 Blue
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87 fwd silver wagon a/t
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Re: 1984 Euro Tercel 4WD Wagon

Post by FRQ »

Thanks for the suggestions. I checked all fuses first. I ended up measuring continuity at the two large plugs underneath the steering column as per the service manual and ended up diagnosing a faulty hazard switch in one position, which led me to believe the mechanism itself was OK.

For the next guy doing a search here: I managed to remove the top steering column clamshell by loosening the two bolts holding the steering column to the dash, which gave me just enough wiggleroom to remove it whilst pushing down on the column. The hazard switch is a plunger style button that is integrated in the entire steering controls assembly. Mine looked very dusty. With the clamshell removed, I had enough access to give the vertical plunger a couple of squirts of DeOxit contact cleaner, after working the button a bit the hazards came right back, problem solved for now, we'll see how it holds up.

This entire job is probably much easier on a US car, because those cars have a seperate horn pad that can be removed, allowing easy access to remove the steering wheel. The euro hornpad is molded into the steering wheel and needs to be folded out of the way to access the steering wheel bolt. No way that was happening without cracking the entire horn pad in half since the once supple rubberized plastic has gone hard and brittle.

The Euro steering wheel looks like this:

Image
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Petros
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My tercel:: '84 Tercel4wd w/extensive mods
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Re: 1984 Euro Tercel 4WD Wagon

Post by Petros »

nice looking interior. that seat fabric pattern was never sold in North American Tecel4wd, we got something we call the "picnic blanket plaid" pattern. that looks like an SR5 model.

that steering wheel is much better looking than the one we got in the States. it appears the one for the North American market was anticipating the explosive device they call a Supplemental Restraints System, (no I am not a fan of having an explosive device go off in your face during an accident).

Though I have not seen your type of steering wheel up close, seems to me there should be some screws you can access on the back of the spokes of the steering wheel that should free the horn cover.
'87 Tercel 4wd SR5 (current engine swap project)
'84 Tercel 4wd (daily driver, with on going mods)
'92 Mazda MPV 4wd (wife's daily driver)
'85 Tercel 4wd DLX auto(daughter's daily driver)
'01 Honda Civic (other daughter's daily driver)
FRQ
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Posts: 48
Joined: Fri Dec 15, 2017 8:05 pm

Re: 1984 Euro Tercel 4WD Wagon

Post by FRQ »

@Petros: there probably are some screws, those are not the issue. The horn pad is one seamless piece that flows into the two spokes and they in turn flow into the rim, no seams. The idea being that you'd peel back the pad from the top down towards the spokes. I'm not convinced the 35 year old rubber would hold up to such a bend, up close I can see some surface cracking already. If I had to remove the steering wheel, I'd probably just remove the entire column, put it in a vise and use the better access resulting from not having to clear the dash with a wrench handle to minimally peel back the pad and go in blind with a low profile socket. Hopefully I'll never have to find out.

By the way, if I could get my hands on a set of brown "picnic plaid" SR5 bucket style seats, I'd swap mine out in a heartbeat, way cooler than my regular ones. Same goes for the funky textured headliner you guys got on some models.
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