ICS/Green Wire issues

[Nachobox]

Hey guys, I've been lurking here about a month and learning a lot but now I'm stumped.

I've got an 84 fj60 that the previous owner put a trollhole carb on and desmogged. I feel like they cut some corners though and weren't very neat about it.

Pretty sure I'm having issues with the ICS/fuel cutoff thing; won't idle (just dies), rev's high with the choke... Here's my problem though, I don't know if the "green Wire" (really the white wire) bypass has been done. This is what I've got a gray connection with a cut green Wire and a yellow wire connected in the box to the black single wire on the carb.

Earlier when I tapped the connection with the key on and motor off I could hear the solenoid click. Now it doesn't click and won't idle. The yellow and green wires go into a small loom that goes into a bigger look and that's all I know.

Any help is appreciated.

Pic of the whole thing included as a newcomer offering

 

[Spike Strip]

With 'key on/engine off' that wire to the ICS should be 12v. If not, there's a problem with the wiring. The carb is grounded through the base, but check for continuity. If those check, then with Key on engine off, check for a click click of the ICS when you tap the connector halves together.

It's been a while since I've thought of this stuff, but I think the wire with the green connector you've got your hand on is the ground thru the Emissions computer.

 

[Nachobox]

With 'key on/engine off' that wire to the ICS should be 12v. If not, there's a problem with the wiring. The carb is grounded through the base, but check for continuity. If those check, then with Key on engine off, check for a click click of the ICS when you tap the connector halves together.

It's been a while since I've thought of this stuff, but I think the wire with the green connector you've got your hand on is the ground thru the Emissions computer.

There's lots of empty/loose wires from the desmog and that one ties into the same loom the other wires go into.

Earlier today I could hear a click when I would put the connection together and it all started working again. Now it's not clicking so something is loose somewhere.

I guess if that wire is in the loom then the PO didn't do the green Wire mod and I might have to.

Thanks for the help

 

[Spike Strip]

When the engine won't idle, jump out and test for the click. If no click, check for 12v. If 12v present, the ICS on those Chi-Comm carb is prolly bad. If no 12V, then prolly wiring.

 

[roadstr6]

Not sure if that is wired correctly but the bottom line is that the circuit needs 12v switched power. You can run a new wire to the fuse box and bypass the questionable stuff. I have even tested the circuit using a hot wire straight to the battery. If you do that, just be aware that the truck will continue to run until you disconnect the wire from the battery.

 

[Nachobox]

Not sure if that is wired correctly but the bottom line is that the circuit needs 12v switched power. You can run a new wire to the fuse box and bypass the questionable stuff. I have even tested the circuit using a hot wire straight to the battery. If you do that, just be aware that the truck will continue to run until you disconnect the wire from the battery.

Current line is showing nada on the voltmeter, ran a hot line from the battery terminal and it clicks... Sounds like I've got some wiring to do. Thanks guys

 

[CuCruiser]

Wire in your hand is the sensor wire for carb fan I believe.

 

[Spike Strip]

Check the fuse -- There is a fuse for that.

 

[morganism]

I would pull the computer and re-solder connector plug contacts first

https://forum.ih8mud.com/threads/1984-fj60-engine-sputtering-bucking.992783/page-7

 

[Spike Strip]

He has a Trollhole carb, the Emissions Computer does not affect it.

 

[Nachobox]

He has a Trollhole carb, the Emissions Computer does not affect it.

Yeah the board might have a connection or two that's cracked but that would be the green ground wire that isn't hooked up anymore. I need to go over the electrical and find out why the yellow wire isn't getting 12v or find a new source.

 

[Nachobox]

I would pull the computer and re-solder connector plug contacts first

1984 FJ60 Engine Sputtering, Bucking

Board does have a broken solder or two but with the trollhole it's a one wire setup that grounds through the carb, no ground circuit to complete on the board. I'll touch them up anyways but with a desmogged trollhole I don't think the board is doing much of anything anymore

 

[Spike Strip]

Did u check the engine fuse?

 

[Nachobox]

Did u check the engine fuse?

Engine fuse looks good. This started as an intermittent issue that has seemingly become permanent. I'm guessing something is loose or a bad connection somewhere.

Yesterday it acted up and an hour later the solenoid clicked when i tapped the connections together and it started working again for a while so the yellow wire has/had power intermittently. Now I'm back to nothing on the yellow.

 

[morganism]

Doesn't it also run the VSV on drivers side wheelwell?