i just had my magna v6 serviced and was told that my idle speed control is stuff. I was told $350 for the part and for him to install but i rang the wreckers and was told $40 for part how easy is it to install and is there a guide on how to do it

any help please

Wow.. thats pretty overpriced.

You can get a brand new ISC for under $100.

Umm, you'll need to remove your intake piping from the throttle body. On the back of the throttle body you'll find your little plastic ISC motor with a plug/connector on it.

Undo the connector. Theres 2 screws holding the isc in place. Then its basically remove, swap, and do the reverse of everything to put it all together.

seems a bit much, from what i hear its fairly easy to do. just a few screws and the old one pops of and wack the new one in. feel free to correct me

Do not forget to set it correctly though, is easy enough to do (no and to all the Disconnect the battery people out there that is not how it is done)

Do not forget to set it correctly though, is easy enough to do (no and to all the Disconnect the battery people out there that is not how it is done)

LOL....i vote disconnect the battery :badgrin: .

But seriously he shouldnt charge you more than an hours labour (it should only take him/her 20mins).

by matt08
how easy is it to install and is there a guide on how to do it


by Madmagna
Do not forget to set it correctly though, is easy enough to do (no and to all the Disconnect the battery people out there that is not how it is done)

Well THAT gave matt08 a wealth of info lol
Never fails to amaze me, the amount of ppl who make/post a comment with the opinion that the reader knows what the comment is about :bowrofl:

C'mon Madmagna, you know your cars inside out - that's obvious - but responding to a *how do I do this* with a *it's simple* & no more, leaves the poster further in the dark

Or to put another way...having never done it myself, FiReStOrM's post explained how - till you added your step, but no explaination :(

Do not forget to set it correctly though, is easy enough to do (no and to all the Disconnect the battery people out there that is not how it is done)
Is this the one involving the cut-out plug? I could never figure out exactly where and how this was supposed to be done...

Do not forget to set it correctly though, is easy enough to do (no and to all the Disconnect the battery people out there that is not how it is done)

How/why would you need to 'set' it?... its only a stepper motor right? :confused:
Its a 3 step rotor, and works off ECU pulse. A pulse is a pulse right? different setting shouldnt change how the motor operates.

The only thing i though would need to be setup would be the base idle. :confused:

How/why would you need to 'set' it?... its only a stepper motor right? :confused:
Its a 3 step rotor, and works off ECU pulse. A pulse is a pulse right? different setting shouldnt change how the motor operates.

The only thing i though would need to be setup would be the base idle. :confused:

Quality knowledge displayed again as always, I love it LOL

To set the base idle you need to disable the stepper by puting the ECU into base set mode. This will ensure the stepper is not active. You use the air screw to set idle and then all is good.

Quality knowledge displayed again as always, I love it LOL
:bowrofl: I was only asking questions, because i didnt know how to 'set the ISC'... which is what your post sounded like you were trying to say. I apologise for that.




To set the base idle you need to disable the stepper by puting the ECU into base set mode. This will ensure the stepper is not active. You use the air screw to set idle and then all is good.

This is the same with most cars. But, you also need to make sure your TPS is set correctly, as the TPS on magnas contain an idle position switch in the same unit. Ignition timing needs to be spot on. Throttle body needs to be clean, to ensure that the air bypass passages are flowing the correct amount of air.

At the end of the day theres too many things to do, just to ensure an accurate base idle. Its just as easy leaving everything as is and adjusting the idle air screw to suit. lol

Quality knowledge displayed again as always, I love it LOL

To set the base idle you need to disable the stepper by puting the ECU into base set mode. This will ensure the stepper is not active. You use the air screw to set idle and then all is good.

Is this via earthing the black diagnostic connector (passenger side firewall), or is that for ignition advance only? :)

I was told by the mechanic that the car was good but the isc was stuffed so i'm only going on by what is was told. I will find out tomorrow when i replac the isc.

I think the point here is that the base idle needs to be set to an appropriate level first, and the ISC then adjusts it up or down from there; if the base idle is too far off, the ISC will work too hard, and could screw up again.
Thing is, with the V6, you first need to switch off the ISC before turning the airscrew, otherwise the ISC will automatically try to compensate for what you have just done. The unclear point is exactly how to achieve this! (pretty sure it has to do with said plug, but don't know if it's just a case of earthing it while you turn the airscrew or what...)?

I think the point here is that the base idle needs to be set to an appropriate level first, and the ISC then adjusts it up or down from there; if the base idle is too far off, the ISC will work too hard, and could screw up again.
Thing is, with the V6, you first need to switch off the ISC before turning the airscrew, otherwise the ISC will automatically try to compensate for what you have just done. The unclear point is exactly how to achieve this! (pretty sure it has to do with said plug, but don't know if it's just a case of earthing it while you turn the airscrew or what...)?

The ISC can't work 'too' hard. Its only made to turn at 3 preset points, each 90degrees from the other.

Would be good if somebody knew exactly how to set it. Mal should know how :) .
Disconnecting the the ISC loom is one way, but i think it might log a fault code. (which is no dramas if u reset the ecu afterwards) but its still more hassle than just doing it the propper way.