1988 Justy heat tube??

[DumbUglyDragon]

Hey Guys,

 

I was wondering on the 1988 Justy, there is a tin foilish tube that runs from the heatshield on the headers to some sort of solenoid on the intake. Does anyone what this part is called and what it actually does? Thanks in advance.

[85Sub4WD]

That is called a preheat tube.

Most carbuerated cars need &/or have that to prevent icing of the carb's throat during warm-up and to allow it to generally run better at lower temps.

(keeps fuel/air mixture more volitile at a higher temp)

Fuel Injected cars don't need them because the computer can accomidate low temps in other ways.

[Skip]

The solenoid you refer to may be a form of vacuum motor on the air cleaner snorkel.

 

The motor could be controlled by a vacuum signal from a solenoid.

when some thermal control senses low ambient temperatures.

 

If you want to see if it is working, remove the fresh air tube

to the snorkel.

 

Look inside the end of the snorkel with a flash light.

 

The vacuum motor should be connected to a flap

via a control rod.

 

This flap is raised by the vacuum motor to divert

the flow of air from the fresh air tube to the

heat tube you speak of.

 

Start the car on a cold day, the flap should raise

thus causing the carb to injest the preheated air.

[DumbUglyDragon]

So, I see.So can anyone explain why my Justy overheats If I wait at stoplights/ trains/ or any idle for more than a couple of minutes? This started happenening after my friend broke the tube while trying to unsmash it(so we ended up pulling it). We also cleaned the carb and nothing else. Anything? Thanks again.

[Skip]

Just a WAG (Wild A$$ Guess)

 

But check the wiring for the radiator cooling fan

(if there is one?)

 

it could have been knackered while messing with the

 

heat tube.

 

Have you tried the Justy only board?

http://subarujusty.proboards20.com/index.cgi