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Old 10-09-2012, 05:07 PM
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Default questions about 78 and 79 2f

I was looking at my 79 2f in the garage and my 78 2f in the fj40 and there seems to be some differences in the air injection system and the emission system. what are the differences and what do I need? pic's are of the 79 2f. the last pic is some parts that justin gave me when I picked up the motor.
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Old 10-09-2012, 06:14 PM
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anybody have photos of their 792f? I think that will helpsome, thanks
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Old 10-09-2012, 08:57 PM
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I sooooo want your hot air manifold piece......
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Old 10-10-2012, 07:17 AM
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me too.

Bomber, what are you trying to do? Fix the emissions equipment on your '78 2F, or fix the emissions equipment on your '79 2F? Were you hoping that the '79 stuff would migrate over to the '78?

You probably need to bust out the emissions schematics from the Haynes manual and start comparing. You can use SOR's website to compare part year applicability.
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Old 10-10-2012, 02:04 PM
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going to put the 79 2f in the 78 fj40, the 78 2f has no emissions on it either. i want to get the 79 2f some what legal for emission testing when the time comes around.
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Old 10-10-2012, 02:29 PM
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Well here's the emissions components for a '79:






To have a complete 1979 emissions system I think you need:
-'79 carb (which it looks like you have but the air cleaner stud is bent and needs to be replaced)
-Air pump (#1) (which it looks like you have)
-Air rail (which you have)
-Air Bypass Valve (ABV) (#5) (which you have)
-Check Valve (#25) (which you have)
-Exhaust Gas Recirculation (EGR) valve (which it looks like you have)
-EGR cooler (which it looks like you have)
-3 Bimetal Vacuum Switching Valves (BVSVs) (#6): 1 light blue, 1 pink, 1 violet. You have a blue one on the side of your thermostat.
-check valve (#49)
-4 Vacuum Transfer Valves (VTVs) (#8): There are brown, green, blue colors. I have a red one on my '77 but not sure that's correct for '79. You have a blue VTV on the side of your carb.
-A 2-port gas filter (#45) (which it looks like you have)
-2 Vacuum Control Valves (VCV) (#50)
-High Altitude Compensation (HAC) valve (#48)
-1 VSV (#7). The VSV you have (the box with the vacuum lines sticking out of it) is for a '75, '76 or '78 emissions system.
-1 EGR modulator (#55)
-Charcoal Canister
-Fuel Separator
-O2 sensor if you're going for full-on '79 emissions. Also need catalytic converters for 1979. Your '78 may or may not need a cat.
-vacuum hose, lots and lots of vacuum hose. It's mostly 3mm, and available in bulk through Toyota (Cdan etc.) or SOR.

Your '78 emissions computer may not talk to your '79 VSVs, so it would be good to have a '79 emissions computer.

1979 is basically a new era for emissions controls, so while there are some things that are common-ish with '78, there are many new parts for '79.

You could probably pass an emissions inspection if your truck is running well and you have your air pump, ABV, air rail, and possibly EGR components hooked up. If it looks like most of your vacuum lines are hooked up to something then you could probably get by. Unless they get suspicious and start tracing vacuum lines.
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Old 10-10-2012, 02:34 PM
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Can you post some pictures of your '78 engine/carb/charcoal canister/fuel separator (by the filler nozzle on the passenger side) so we can see what you have?
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1996 FZJ80 1FZ-FE factory lockers + Safari Turbo , CDL switch, cup holder, AATLAS1X leather, heated seats and JDM switches
2000 Tundra Limited TRD 2UZ-FE SOLD
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Old 10-10-2012, 10:31 PM
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subzali, thank you very much for the information you provided above and your information on what i have and do not have. i will get some pics of the 78 2f with in the next few days. again thanks alot.
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Old 10-11-2012, 04:47 PM
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If the rig is a 1978, that's what it needs (NO CAT!!!).

And they may or may not care if it has EGR. While technically it came on the 78, it may not be necessary to pass. Mainly they will look for the smog pump and whether it has a belt attached.

If it were my rig, I would stick the motor in with just the bare minimum (smog pump) and baseline it before I started adding stuff.
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Old 10-11-2012, 05:10 PM
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Quote:
Originally Posted by Rzeppa View Post
If the rig is a 1978, that's what it needs (NO CAT!!!).

And they may or may not care if it has EGR. While technically it came on the 78, it may not be necessary to pass. Mainly they will look for the smog pump and whether it has a belt attached.

If it were my rig, I would stick the motor in with just the bare minimum (smog pump) and baseline it before I started adding stuff.
X2. I wouldn't add anything more than what you need to pass emissions.
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