My Desmog Thread (10 Viewers)

[Willman]

Nic,
you're welcome.

Timing would have to be way off to cause a vibration at idle. It's prolly the normal fuel distribution misfire. It's the nature of a single carb on a long engine.

Are you grounding the idle circuit, or are you keeping the decel fuel cut system?
If the decel fuel cut is to be removed, then permanently ground the ground wire for the carb. Dunno colors, I always check w/ the VOM to be sure. Turn the key on, probe the vehicle connector to the carb. one wire will show +12V, the other will show zero. The ground (zero V) wire from the carb needs to be grounded. Snip the wire, install a ring terminal and screw it to body.

I assuming i passed the JIM C smog 101 by my pictures?

I'm all good now for the most part. I did ground the decel fuel wire. She sure runs great. The only thing i need to do is check for some vac leaks and adjust the carb idle speed as it is too low.
Thanks Jim for a great job on the carb. rebuilt.

Another thing i have noticed is some small amounts of water coming out of the tailpipe. Is this casued by the CAT not being removed or is it just normal on start up? (Just rebuilt head as well)
Is the CAT ok for a while until i put a straight pipe in or does it need to go asap? I hate to gut it out (only as 2K on it)....I think i will sell it...

Thanks

 

[FJ40Jim]

What is visible in the tiny pics looks OK, except the decel fuel cut function has been rendered inoperable.

Water out the tailpipe is desirable.
Perfect combustion = CH + O2= CO2 & H2O.

The cat can stay indefinitely. If it is new, it poses no noticeable restriction to exhaust, and it does clean the exhaust gas.

 

[71cruiser71]

ok now its my turn for a desmog 3 days of reading and trying to understand i still have a couple of Qs.

im putting a 2F from an 86' 60 series into my 71' 40series

and im getting rid of everything i dnt need, smog n' junk
im planning on throwing on headers (machined flange), now should i use my intake manifold from my 71F? im not really sure what the 86 manifold looks like on the firewall side? and i want to add the canister from the 86 as well... so if someone could take a pic of that side of the manifold for me that would be fantastic! or tell me whats going on over there?

but i have some issues if you will. my 40 doesnt have any of the electrical hookups that the 60 motor has.

ive pretty much got the whole hose routing thing understood.
but the fuel cut off is something that im gonna run into. do i need the comp from the 60? also what is the electrical hook up going to the carb? looks like a black and white wire with green connector. is this just a 12v key and a ground? also what are the thermostat hook ups about? since its going in a 71 can i just cap them with jims kit?

also since im going to be desmogging do i REALLY need to send my dizzy in for a re-curve? cuz i unfortunatly dnt have the the time and money atm. school is starting soon and this is the only vehicle i have. basically im wondering if i can get away with just running it like it is?

i hope im posting in the right place. it seems like a very knowledgable crowd over here

 

[1911]

also what is the electrical hook up going to the carb? looks like a black and white wire with green connector. is this just a 12v key and a ground?

Power to the fuel cut solenoid. Yes, the black wire is 12v from the ignition switch. Just ground the white wire if you don't want to mess with the emissions "computer".

 

[Willman]

What is visible in the tiny pics looks OK, except the decel fuel cut function has been rendered inoperable.

Water out the tailpipe is desirable.
Perfect combustion = CH + O2= CO2 & H2O.

The cat can stay indefinitely. If it is new, it poses no noticeable restriction to exhaust, and it does clean the exhaust gas.

Thanks Jim!

 

[FJ40Jim]

im putting a 2F from an 86' 60 series into my 71' 40series

and im getting rid of everything i dnt need, smog n' junk
im planning on throwing on headers (machined flange), now should i use my intake manifold from my 71F? im not really sure what the 86 manifold looks like on the firewall side? and i want to add the canister from the 86 as well... so if someone could take a pic of that side of the manifold for me that would be fantastic! or tell me whats going on over there?

but i have some issues if you will. my 40 doesnt have any of the electrical hookups that the 60 motor has.

ive pretty much got the whole hose routing thing understood.
but the fuel cut off is something that im gonna run into. do i need the comp from the 60? also what is the electrical hook up going to the carb? looks like a black and white wire with green connector. is this just a 12v key and a ground? also what are the thermostat hook ups about? since its going in a 71 can i just cap them with jims kit?

also since im going to be desmogging do i REALLY need to send my dizzy in for a re-curve? cuz i unfortunatly dnt have the the time and money atm. school is starting soon and this is the only vehicle i have. basically im wondering if i can get away with just running it like it is?

Don't make this harder than it has to be. Use the 71 carb & intake manifold. It will connect to the stock wiring, fuel lines, throttle linkage, clears the master cylinder, etc.

use the stock 71 canister. The FJ60 canister bracket doesn't bolt to FJ40 fender, plus it has hoses that the 71 can't use.

Remove both BVSV's from the t-stat housing and install allen plugs.

Dissy recurve is nice, but not a requirement.

Here's my parts recipe for an 86 2F engine into a 71 FJ40:
86 2F longblock
86 vavle cover, oil cooler, WP, fan clutch, t-stat
71 fuel pump, fuel line, carb, air cleaner
86 fuel pump spacer!
71 intake manifold
Mark's exh headers & new exhaust
86 dissy & ignition & dissy cap ventilation system
86 internally regulated alternator in 86 alt bracket
minitruck PS pump mounted in custom bracket down in 2F air pump pivot
71 clutch, FW, hydraulics
74-80 4speed & 71 t-case

HTH

 

[71cruiser71]

Here's my parts recipe for an 86 2F engine into a 71 FJ40:
86 2F longblock
86 vavle cover, oil cooler, WP, fan clutch, t-stat
71 fuel pump, fuel line, carb, air cleaner
86 fuel pump spacer!
71 intake manifold
Mark's exh headers & new exhaust
86 dissy & ignition & dissy cap ventilation system
86 internally regulated alternator in 86 alt bracket
minitruck PS pump mounted in custom bracket down in 2F air pump pivot
71 clutch, FW, hydraulics
74-80 4speed & 71 t-case


that seems like it will work out nicely! only thing is that i sold the weber carb to help pay for the motor. trollhole!

- sorry no expert here- what is dissy cap ventilation system?

 

[FJ40Jim]

Here's my parts recipe for an 86 2F engine into a 71 FJ40:
86 2F longblock
86 vavle cover, oil cooler, WP, fan clutch, t-stat
71 fuel pump, fuel line, carb, air cleaner
86 fuel pump spacer!
71 intake manifold
Mark's exh headers & new exhaust
86 dissy & ignition & dissy cap ventilation system
86 internally regulated alternator in 86 alt bracket
minitruck PS pump mounted in custom bracket down in 2F air pump pivot
71 clutch, FW, hydraulics
74-80 4speed & 71 t-case


that seems like it will work out nicely! only thing is that i sold the weber carb to help pay for the motor. trollhole!

- sorry no expert here- what is dissy cap ventilation system?

There's no reason to buy a chinese copy of an 84 2F carb, if you already own a 86 toyota carb.

The dissy cap vent system is the 2 hoses on the dissy cap. One goes from cap to a tiny air intake filter on the FJ60 firewall. Other goes from cap to a VCV and on up to the air cleaner lid, where engine vacuum draws air through the cap and into the cleaner.

 

[71cruiser71]

ooh that does mke sense...

ill just follow the desmog (from this desmog thread)

ok which brings me to my next question. i would reallly like to keep the fuel decel switch, embarassing when your out wheelin and your coming down a steep incline and get backfire hahaha

so this green wire mod... since im grounding out the wire that goes to the idle switch thing, is that all the green wire mod is? i dnt see how that does anything but just ground the switch????
i cant seem to find a single picture of this green wire mod?

i really appreciate the help

​

 

[csd4682]

I am going to complete my desmog this weekend (hopefully). Trapper50 Thank you so much. your pics were the only ones that made enough sense for me to attempt figuring this out. However, I have a couple of questions about some hoses that I just cant trace in your pics. In the bundle of 3 wires coming across the head, there is one that goes to the gas filter, and one to the valve by the carb fan. Which one of those is coming from the dizzy advance, and which one to the valve under the air cleaner. Another couple of questions, the bundle of wires that look like they are coming from below in front of the motor, where do those go?

Question for all. I am keeping the a/c idle up. Obviously one of the hoses goes to the ac up diaphram, but where does the other hose go? Thanks everyone who has contributed to this thread.

 

[laguna80]

I am going to complete my desmog this weekend (hopefully). Trapper50 Thank you so much. your pics were the only ones that made enough sense for me to attempt figuring this out. However, I have a couple of questions about some hoses that I just cant trace in your pics. In the bundle of 3 wires coming across the head, there is one that goes to the gas filter, and one to the valve by the carb fan. Which one of those is coming from the dizzy advance, and which one to the valve under the air cleaner. Another couple of questions, the bundle of wires that look like they are coming from below in front of the motor, where do those go?

Question for all. I am keeping the a/c idle up. Obviously one of the hoses goes to the ac up diaphram, but where does the other hose go? Thanks everyone who has contributed to this thread.

It's my understanding that the outermost port on the dizzy goes to one of the three fittings on the aircleaner that attaches to the carb. The gas filter off the manifold goes to the bottom fitting of the valve thingy that's just below and on the side of the aircleaner on the distributor side.
The other ac idle up hose goes to a fitting attached to another large vacuum hose located on the firewall side of the carb. It's highlighted in red in the second pic of this post. https://forum.ih8mud.com/60-series-wagons/188643-my-desmog-thread-31.html#post5694136

EDIT: Those lines coming from the front of the engine are for the BVSV 1. They are coming from the ports which come out of the thermostat housing.

 

[FJ40Jim]

ok which brings me to my next question. i would reallly like to keep the fuel decel switch, embarassing when your out wheelin and your coming down a steep incline and get backfire hahaha

so this green wire mod... since im grounding out the wire that goes to the idle switch thing, is that all the green wire mod is? i dnt see how that does anything but just ground the switch????
i cant seem to find a single picture of this green wire mod?​

The decel system needs a 78-87 US spec carb, the vacuum switch, the 79-87 emission computer & the 79-87 speedo.

Without the appropriate stuff, hooked up properly, it won't work.

The green wire mod is just grounding the formerly switched ground wire for the ICS. This bypasses the computer decel system, then the ICS behaves like a 78-older carb: on w/ ignition, off w/ key off.

 

[71cruiser71]

awsome, i think that about covers it. ill just plug the fuel decel port and call it.

 

[brett76]

one thing i didnt see after reading the thread and i may have just missed it is what do you do with the open vtv nipple that the asv used to go to after you delete the asv? do you just block it? or does another line take its place?

 

[FJ40Jim]

Brett, I'm not totaly clear on what you're talking about. There is only one VTV that remains (and it is not really needed), that is the one on the carb for the CB.

 

[brett76]

Brett, I'm not totaly clear on what you're talking about. There is only one VTV that remains (and it is not really needed), that is the one on the carb for the CB.

damn, well that makes it easier. thank you! (off to reread thread and study diagrams for umpteenth time lol)

 

[laguna80]

I believe that it can come from any manifold vacuum port, but it's probably best to wait for confirmation as I am far from an expert.

 

[Beams37]

BVSV1

Hey Guys,

I'm hoping I'm not the first with this problem. I'm also hoping Jim will provide some feedback.

In the Desmog Diagram, it shows 2 hoses going to the BVSV1. Both vacuum ports are broken off of my BVSV1. So, can I delete that from my system and still have a healthy engine?

If not, can the ports be replaced? Does anyone know where I can get one with 2 ports on it??

Also, How much are you charging for a Re-Curve these days? Also, what is the average turn-around?

Thanks to all who have contributed and asked questions that have already helped me out.

Josh

 

[Beams37]

Got everything buttoned up just now. Pics will follow this. I followed trapper50cal's desmog which is an HAC delete desmog. Things that are different on mine. I had to get huge ass bolts to plug the air rail holes because the hardwares stores didn't have those pipe plugs in the right size. I broke the nipples on BVSV 1 so I'm using BVSV2 for now until I get a replacement. The truck runs like ****, but I have a feeling that there are major exhaust leaks. I can't even get the **** thing to idle. Well, here are the pictures. Let me know if you see something totally jacked. Tubing is all silicone variety from McMaster-Carr.

Could or Someone possibly give me a "connect-the-dots" explanation/picture of where exactly the hose from the fuel decel solenoid on the drivers side connects ??

I would greatly appreciate. After 600 posts I'm just confused on this one. Thanks!

 

[goodol84]

If you are not doing the "green wire mod" like me then I believe it connects to the fuel cut port on the carb show in the schematic. We may have already plugged that port but I forgot we're doing yours a little different.