1990 tracker isc solenoid test?

[rjm]

The isc solenoid functions fine electrically but I'm unsure how to test the sealing aspect. I followed fixkick instructions of blowing into 1 hole (using hose and mouth) to confirm no air passes to "other hole" when NO VOLTAGE is present. I confirmed I get air passing through ALL 3 holes with NO VOLTAGE and with VOLTAGE! I'm not understanding which holes should flow air on a PROPERLY operating noid. We have 3 holes in BOTH the noid and the TB. 
 Could you please explain the flow path of this device?
I am now on a quest to find a replacement in the junk yard but want to be able to test it before I buy it. Also could you clear up the uncertainty of which holes should pass air with noid powered (for 1 second max) 
Thanks rj

[fixkick]

1990 has has  no 3 holes.  at  all,  91+ up does.
1990 is Generation 1 car, is your engine still 90?
I can not see your car, nor the engine nor the TB nor the ISC on your car , please show photos and we can talk x10 more effective.

31 year old cars have this bad habit of gaining swapped in wrong parts,  for sure on 90s. where parts are so super hard to find. now.
put photos our  now working gallery and link them to your posts. thank you;

in the year 1991 suzuki added 2 water hose/passages to the ISC this water path heats up the TB and makes cold starts make less smog and longer lasting CAT.
This is what those water pipes do, they are just open paths in/ out water, no 89/90 ever had such a water path. ever.
on the 89/90 there is no electric plug on the IAC, it has just 2 pig tail wires,  , and inside the ISC as  it connect to the TB are 2 air holes.


first is 91+  up. GENE 2 and 3 cars only 91-98
off my ISC page. the fresh air enters hear and exacts on the back side, to TB,  and is closed at 0volts and opens with 12vdc.
see screw driver pointing to air exit port , Idle air hot engine only
the ecu modulates this solenoid 200 times a second to control idle.hot. it is in fact a solenoid air control valve in pure engineering parlance.


here is what  90 ISC looks like , poor photos. 31 year old cameras are junk.  a generation 1 car it is, (was) what is now, I can never guess.
now we do 89./90  Gen 1 car. notices the total lack of any kind of coolant (water) heating in the ISC. and the 2 times lower solenoid coil at 6 ohms not 12.



see this page in gen1 IAC
see real photos

https://fixkick.com/IDLE-AIR/1989-90/ISC...index.html

photo 2 in link above, shows someone long ago Jerry rigged  the ISC gasket to get idle speeds higher with dead ISC. hot.

you should tell me how 91+ engine got in to your 90 car, so I can talk and not have to do all years made. over 4 generations.

[fixkick]

this is why they say a photo is worth 1000 words.
for sure here. or any text only forum. but we do have gallery,
even add lots of photos of your car to the gallery, and for sure the engine bay in this case.

[fixkick]

the ISC on this car, when you apply 12vdc to the coil (solenoid coil) 90'
do so for only 1 second, or you will burn up the coil inside.
1 second then rest , for say 15 seconds so it can cool down the coil.
the current flow will be 2 amps, and 2 x 12 is 24watts of heat, (on running car is is far less than 10 watts) (this is precautionary practices)

here is 91, testing , fast connections my me, to keep it cool. The valve can be seen to actually open with eyes 91.+

https://fixkick.com/videos/FLV-all/showtime.html#ISC

you can see it open
you can hear it open
and blow air and find it opens and close using lips and say rubber hose.
89''/90, same thing. just wired differently. and no water hoses, at all.

[fixkick]

so you have 91 engine or newer as swap
or have 91 or newer throttle body. on 90 cars.
seems so to me. photos of it are SUPER USEFUL,

[rjm]

here are pics from "my pics" i don't understand how to get pics into "my gallery" its not working for me. Notice the 1 gasket that goes between the top and base of the TB seems to be missing a hole - please advise if I should add this hole. (seems obvious I should) may help someone else in the future to know.
I would still like my original question addressed. "Which of the 3 holes in the isc should /should not allow air to pass through with NO power to noid. 
https://fixkick.com/forum/ezgallery.php?...iew&id=500
https://fixkick.com/forum/ezgallery.php?...iew&id=499
https://fixkick.com/forum/ezgallery.php?...iew&id=498
https://fixkick.com/forum/ezgallery.php?...iew&id=497
https://fixkick.com/forum/ezgallery.php?...iew&id=496
https://fixkick.com/forum/ezgallery.php?...iew&id=495
https://fixkick.com/forum/ezgallery.php?...iew&id=494
https://fixkick.com/forum/ezgallery.php?...iew&id=493
https://fixkick.com/forum/ezgallery.php?...iew&id=501

[fixkick]

here are pics from "my pics" i don't understand how to get pics into "my gallery" its not working for me. Notice the 1 gasket that goes between the top and base of the TB seems to be missing a hole - please advise if I should add this hole. (seems obvious I should) may help someone else in the future to know.
I would still like my original question addressed. "Which of the 3 holes in the isc should /should not allow air to pass through with NO power to noid. 

no automatic trans and where is the brake booster?
that is a 90 TB no lie
now I know what you mean by holes. and we can do all that.:
the TB has holes that must not be blocked and other must be. or what are called from carbs to now Drillings (bottom of TB fuse sure has those, and are blocked or it fails)
i guess there are more, sure the 3  holes in the ISC air valve end , too. (I have no drawings of the guts of any ISC made 89/90, but i think is like 2 air in and 1 out or the reverse. not sure,... )
lots of holes there are..
first is bottom side TB
https://fixkick.com/IDLE-AIR/Slide_Show/...ge_16.html

see those water and air holes must not be blocked and the 5 that must?

the slot can be a slot or just some holes where this slot is. this is ported vacuum that slot.
see my home made gasket here, this answers the red arrow question in your photo. these next links.
https://fixkick.com/IDLE-AIR/Slide_Show/...ge_21.html

now the top. you do not have what I call the idle bleed air screw,  seen only 91+
the 90 top has 3 things to block or not. the underside of the air horn side see , the answer there, too, not photo'd, there is nothing there 80/90 .

the inboard hole is blocked, due to , not a 91 air horn with no air bleed valve there, but i really can not see your front view, straight on.
I say that due to some cars have mixed up parts even in the TB.  so photos of all sides of TB are needed to wax smart me.


https://fixkick.com/IDLE-AIR/Slide_Show/...age_5.html

next is it top of TB.



last is best the Pro grade gasket kit
shows them all 5speed ,3speed and , pre 91 and 91 up all in one kit.  (the extra gaskets for 3sp auto is for the silly base heater gaskets.)

https://fixkick.com/IDLE-AIR/Slide_Show/...ge_36.html


this is 91 + but ignore the bleed path. (top horn air bleed)
https://fixkick.com/IDLE-AIR/Slide_Show/...ge_39.html

[rjm]

you can barely see the brake booster in "engine bay 1" photo -its hidden by the air filter box. you can also see the clutch cable in the same photo (indicating it is a manual trans (5 spd) with power brakes.
my concern is the polygon hole shown here and the lack of hole shown here in gasket? I am using SMP kit # 1716 
https://fixkick.com/forum/ezgallery.php?...iew&id=501
https://fixkick.com/forum/ezgallery.php?...iew&id=498

[fixkick]

you can barely see the brake booster in "engine bay 1" photo -its hidden by the air filter box. you can also see the clutch cable in the same photo (indicating it is a manual trans (5 spd) with power brakes.
my concern is the polygon hole shown here and the lack of hole shown here in gasket? I am using SMP kit # 1716 
https://fixkick.com/forum/ezgallery.php?...iew&id=501
https://fixkick.com/forum/ezgallery.php?...iew&id=498

the gasket show above in my links shows that clearly blocked

here it is , inserted directly see the word bleed,
the where yours is , is blocked. the round hold below is blocked the other one inboard is blocked.

the warning I put below is if the gasket cracks and sucks in ,as they love to do it sucks air at the crack and idle races way too fast.

[rjm]

You are spot on - mine sis just that! I had this crazy idle and peeked inside the TB THROAT and could see the gasket edge well inside the throat. I also tested the isc by blowing into the holes - all 3 pass air when NO POWER is applied. How do I know when I find a good isc? What is test = good/ pass ( my original question)