no difference. I do have a couple kicking around. The question is do you need one, or are you looking to acquire a spare? I keep a spare in my car because I've had mine crap out and the poor gal wouldn't even idle.
Last edited by Johnny Larmond; April 09, 201312:14 pm UTC.
I'm almost certain I need one, maybe a vacuum leak but i'm pretty sure its the isc... It starts to surge after the car has been idling for a few minutes bit once I drive the car it is not as bad...
Re: Idle speed controller
[Re: Nigel Hap]
#399807 April 09, 201301:35 pm UTCApril 09, 201301:35 pm UTC
I used to have similar issues. The idle surging was caused by the ISC going haywire. However, the ISC seemed to be behaving that way because of the vacuum leaks nearby (TB shaft, crack in the IM). One I fixed the leaks, the ISC worked perfectly again.
I am also on SD.
ISCs get blamed kinda quickly. I would do a BLT first.
Sorry to muck up your thread.
1995 TSi AWD 11.7@119 1.8 60' - Curse of the Bad Driver PHP: 0
Re: Idle speed controller
[Re: Nigel Hap]
#399817 April 09, 201304:04 pm UTCApril 09, 201304:04 pm UTC
This can happen when too much air gets past the closed throttle plate and might be fixed by resetting the BISS.
If it's a 1G you also need to make sure that the closed throttle position sensor (idle switch) is functioning properly and screwed in the correct distance. If it's a 2G you should check the TPS for the same function.
1993 Eagle Talon TSi FWD 13.8 @ 106 :::: 14.1 @ 117
Re: Idle speed controller
[Re: Rob Strelecki]
#399818 April 09, 201304:09 pm UTCApril 09, 201304:09 pm UTC
This can happen when too much air gets past the closed throttle plate and might be fixed by resetting the BISS.
If it's a 1G you also need to make sure that the closed throttle position sensor (idle switch) is functioning properly and screwed in the correct distance. If it's a 2G you should check the TPS for the same function.
It can be simulated with Link on a 1G, in case your connector decides to break like mine did. But then you need to make sure your TPS is lined up properly
'92 Talon TSi AWD - 5 Speed/E16G/12.385s @ 115.13mph
Re: Idle speed controller
[Re: Nigel Hap]
#399822 April 09, 201304:30 pm UTCApril 09, 201304:30 pm UTC
The ISC is very simple to check. Look and see whether or not you get resistance across the 4 coils.
1---2---3 4---5---6
You want to check resistance between 1-2, 2-3, 4-5, and then 5-6. If any of those are open or below 28ohm (might be wrong on that value), then that coil is bad and the ISC is junk.
Or, just watch this.
Last edited by Johnny Larmond; April 09, 201305:59 pm UTC.
Thanks a lot for all the info, i'm going to start by checking for leaks and work my way down the list.. I'll post as to how things go and if I actually need the isc
Thank you again!!!
Re: Idle speed controller
[Re: Nigel Hap]
#399850 April 09, 201307:50 pm UTCApril 09, 201307:50 pm UTC
This can happen when too much air gets past the closed throttle plate and might be fixed by resetting the BISS.
If it's a 1G you also need to make sure that the closed throttle position sensor (idle switch) is functioning properly and screwed in the correct distance. If it's a 2G you should check the TPS for the same function.
It can be simulated with Link on a 1G, in case your connector decides to break like mine did. But then you need to make sure your TPS is lined up properly
Yep but I really wanted to highlight that if it's screwed in too far, it will hold the throttle plate open, causing idle surge regardless of the sensor function.
Oh and I should add that a dirty TB can cause it to stick open too.
Last edited by Rob Strelecki; April 09, 201307:58 pm UTC.
Re: Idle speed controller
[Re: Nigel Hap]
#399926 April 10, 201308:34 pm UTCApril 10, 201308:34 pm UTC