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Old 05-04-2003, 17:13   #1 (permalink)
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ISC disconnected

Hey guys.

I noticed yesterday that my car runs no differently with the ISC unit connected or not.

If I have the car in self test mode, the idle will increase as usual, and will drop if the ISC is removed, however, when the car is not in this mode, there is no change. This suggests that ISC is not stuck.

I tested a constant 13.5V at the ISC on normal Idle.

So my question is, should I notice a difference in at idle in normal mode when connecting/disconnecting?
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Old 05-04-2003, 19:59   #2 (permalink)
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No you shouldn't notice a difference in idle with your car in Park, this means your idle is set at the right speed.

Yes you should notice a difference when you put it in Drive(assuming you have a auto, which I know you don't ) or you put the air con on and the motor nearly shits itself. The ISC only seems to change the idle when situations change, eg. air con, power steering load or car put into Drive.
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Old 05-05-2003, 00:50   #3 (permalink)
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yes the ISC is to compensate for extra loads placed upon an idling engine and for the extra air needed when its cold etc, and to stop the engine crashing back to idle when you change gears in a manual - helps with smooth shifts
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Old 05-05-2003, 01:37   #4 (permalink)
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Sweet!!

Thanks guys.
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Old 05-05-2003, 03:18   #5 (permalink)
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Its a shame mine idles like crap if i disconnet the ISC.
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Old 05-05-2003, 06:42   #6 (permalink)
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Quote:
Originally posted by myxr6
Its a shame mine idles like crap if i disconnet the ISC.
Idle screw/ adjustment is too low then..
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