ISC Motor Sound/Motion ?

[zyphermonkey]

I've finally got a hold of an ISC that has all 3 coils testing good, but when I do the 6v test the pintle only jostles around right when I apply the voltage. I hear no hum like I've read about.

Can someone tell me if this is right or not. I would also appreciate if it is wrong if someone could post a video somewhere to what it should sound/look like with voltage applied.

 

[zyphermonkey]

Any information would be helpful so I know whether or not to request a another one.

I would test it by putting it on my car but I believe my FIAV is also bad causing my cold idle surge problem and I just want to make sure that when I get that fixed I have a working ISC.

 

[Lofty]

Any information would be helpful so I know whether or not to request a another one.

I would test it by putting it on my car but I believe my FIAV is also bad causing my cold idle surge problem and I just want to make sure that when I get that fixed I have a working ISC.

Just find someone with one, go to a pick and pull. It shouldn't jostle around. Try to clean it!

 

[snowborder714]

I don't believe mine moves around a lot when voltage is applied. As long as it moves, it should be fine. I typically rely on the resistance test to determine if it's good or not.

 

[zyphermonkey]

The resistance tests fine.

I'm only concerned because it's not humming(like the manual says it should), just makes an initial click when voltage is applied and nothing afterward.

 

[snowborder714]

I can test a few good ones I have this weekend if you'd like and see what happens.

 

[zyphermonkey]

That sounds great.

Any video footage would be great to if yours do do something.

 

[snowborder714]

Here is a video of a good ISC I tested today.

YouTube - DSM ISC

 

[steve]

Notice how the first time it chatters pulling the pintle into the ISC. That's the ECU rehoming the ISC because it doesn't know where the pintle is, so it "oversteps" to make sure that it's all the way out (it's all the way into the ISC but all the why out as far as air bypassing via the ISC). Each time after it has a good idea of the position so the stepping is smooth in and out.

A bad ISC or ECU drivers will either just twitch or go one direction but not the other.

Thank you for the vid. I've been meaning to take one but I don't have a camera.

BTW there are four coils in the ISC not three.

 

[xxqpxx]

A bad ISC or ECU drivers will either just twitch or go one direction but not the other.

what if the isc does absolutly nothing?
but all for coils are at 42 ohms
and it is a new isc

 

[snowborder714]

What do you mean by "absolutely nothing"? Do you mean it is not acting like the one in the video from above?

If not, then I'd guess there's a wiring problem since it tests out fine.

 

[steve]

I guess I assumed people would know that ones that do nothing are a problem.