ISC Motor

[livedsm4g63]

Alright so I have tried searching but I would like some opinion from you guys. I have had an idle surge for awhile and i decided to check my isc today since I had some down time.

All 4 ohm readings were 40 ohms. And when i hooked up the 6v battery to the motor it only twitched. It didn't move in and out. So i went ahead and hooked it back up to the wire harness and propped it up so i could see it when i turned the car to the on position. However, when I turned it to the on position it only twitched again, and it didn't move in or out.

Think its bad?

 

[razrman8]

It is very well possible that is bad. Especailly if it did not fully move in and out. Have you ruled everything else out?

 

[livedsm4g63]

For the most part. I would like to do another blt but i dont have access to air at the moment. It didnt move in or out at all. Just twitched like a homeless guy on crack.

 

[LiquidX]

It's shot. Rockauto has them for cheap and they work well. I'm currently using one from them right now. If you search for them on the vendor list, you can dig up the 5% discount code.

 

[AlaskanDsm]

Have you seen the ISC vid to see if yours is similar at all?

YouTube - DSM ISC

 

[razrman8]

Darn you Matt!! I search and search for that video everytime one of these come up. I am now favoriting it.

OP, if it is not moving like in the video posted above, it is done for.

 

[livedsm4g63]

Yeah I saw that video a few mins ago when i was searching. How much they run from rock auto?

 

[AlaskanDsm]

Hahahahaha, I just go

1) youtube.com
2) search DSM ISC
3) normally in top 5 results



I just posted it in case the OP hasn't seen it and needs something to reference it to.

 

[LiquidX]

Between $70-$80 depending on brand. For a 91 only 1 brand is listed however the IAC is the same for all years except for a 1990 TB so find the cheapest one. I use a Standard Motor Products IAC.

 

[Imback]

Or you can order from dsmisc.com and get a brand new revised OEM one for 130. And only difference between the 90 isc is the extended harness.

 

[LiquidX]

So double the amount for the same thing?

 

[livedsm4g63]

Hmm interesting. Yeah I just tried out my roommates and his didnt even twitch. Two are in need of.

 

[Imback]

So double the amount for the same thing?

Nope your paying a little more for oem quality. Ex: Oem starter last for over 15 years. Advanced auto etc etc starter gone through 4 in a year.

 

[ramsack]

40 ohms is good, and hooking a battery up to 1 coil at a time will result in a twitch. It's a stepper motor, they need precise phase controls to get the motor to spin. Test it off the throttle body but plugged in. The black kind shown in the above video are the best kind and can be found on pretty much any Mitsubishi in a junk yard, and they should last forever if kept clean. They fail because of EGR soot and PCV oil.

 

[livedsm4g63]

40 ohms is good, and hooking a battery up to 1 coil at a time will result in a twitch. It's a stepper motor, they need precise phase controls to get the motor to spin. Test it off the throttle body but plugged in. The black kind shown in the above video are the best kind and can be found on pretty much any Mitsubishi in a junk yard, and they should last forever if kept clean. They fail because of EGR soot and PCV oil.

I did do it right off the harness as well with it hooked up to the battery. Both just twitch.

 

[Imback]

I hope you meant you used a 6 volt battery for testing.

 

[LiquidX]

Nope your paying a little more for oem quality. Ex: Oem starter last for over 15 years. Advanced auto etc etc starter gone through 4 in a year.

It's the same thing bud The only difference is a Mitsubishi logo is missing.

I hope you meant you used a 6 volt battery for testing.

... And when i hooked up the 6v battery to the motor...

 

[livedsm4g63]

I hope you meant you used a 6 volt battery for testing.

Nope just hooked it straight up to the battery....(sarcasm)...
I do research i just wanted to know, since its not moving in or out, if its bad.
Yes i used a 6v.

 

[Imback]

Damm old age..

 

[livedsm4g63]

Its all good. Well hopefully I can find one soon. If not by friday, Ill have one ordered. Thanks for the input guys.

So could I get a part number for one? I just talked with RockAuto and they say they dont carry them. I need something to reference it to.

 

[LiquidX]

Goto rockauto.com it will be listed under air/fuel as the IAC (idle air control). The one listed under a 97 is cheaper and is the brand I'm using without any issues.

 

[livedsm4g63]

Oh. I thought it was a 1g, 2g thing. So I may have been mistaken. You can use the 2g sensors as well?

 

[LiquidX]

The IAC is a 90-99 part.

 

[livedsm4g63]

Even better. Thank you!

 

[92AWDHX40]

I always pick them up at the junkj yard two screws and their mine i keep a stock of them just found another black one, i tested all of them from many cars all good.