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Old 11-10-2013, 08:24 AM   #1
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Idle Issue Replaced IDLE SPEED CONTROL

Hi Guys,

I recently replaced my IDLE SPEED CONTROL valve as I was having an idle issue plus other sensors but since the IDLE SPEED CONTROL valve was replaced with a new one it has developed a new issue. When starting the car for the first time each day the engine will kick over run then cut out real quick I then have to try and start again but this time it stays running as it should and no trouble for the rest of the day. This only happens for the first start of the day.

The one thing I noticed when when I removed the old IDLE SPEED CONTROL was that it had no gasket from what I could see but the new one came with a gasket and was installed with the new IDLE SPEED CONTROL.

Any help would be great.


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Old 11-10-2013, 08:53 AM   #2
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Hmm, IAC should not affect starting, that is either a spark of fuel issue. Start with the 2 easiest things first, spark plugs and fuel filter.

What other sensors were replaced? MAF, or O2 sensors?
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Old 11-10-2013, 09:04 AM   #3
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I have replaced the O2 sensor, crank case hoses & PCV valve, throttle body & throttle sensor, leads & spark plugs. But these do not co in side with the issue it only started with the IAC being replaced straight away.
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Old 11-10-2013, 07:44 PM   #4
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IAC controls the air into the engine during starting. It is set to a desired AM for the given conditions.
Try starting it with you foot on the gas pedal, but only a very small amount.
If the IAC is doing something strange, it should stay started with the throttle.

Where did you get the IAC? The calibration for the IAC is tailored to the original part for the vehicle. Make sure you get a DIRECT replacement.
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Old 11-11-2013, 02:38 AM   #5
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Quote:
Originally Posted by paulg127 View Post
IAC controls the air into the engine during starting. It is set to a desired AM for the given conditions.
Try starting it with you foot on the gas pedal, but only a very small amount.
If the IAC is doing something strange, it should stay started with the throttle.

Where did you get the IAC? The calibration for the IAC is tailored to the original part for the vehicle. Make sure you get a DIRECT replacement.
It is a direct replacement for my engine. It was brought off ebay in the UK as here in Australia the a bunch of rip off merchants here.

I started it today and it didn't cut out but dropped in idle then rose up to a litle over 1000rpms it seems temp is a factor in this as I had parked it in my front yard over night and it was nice a warm this morning then the last few weeks of cold weather.
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Old 11-11-2013, 03:42 AM   #6
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Old 11-11-2013, 08:55 AM   #7
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Quote:
Originally Posted by paulg127 View Post
IAC controls the air into the engine during starting. It is set to a desired AM for the given conditions.
Try starting it with you foot on the gas pedal, but only a very small amount.
If the IAC is doing something strange, it should stay started with the throttle.

Where did you get the IAC? The calibration for the IAC is tailored to the original part for the vehicle. Make sure you get a DIRECT replacement.
that's the answer

the only thing I would add is a reminder to reset the ECU by disconnecting the battery for a few minutes. Those new sensors you replaced are begging to be calibrated.
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Old 11-18-2013, 07:37 AM   #8
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that's the answer

the only thing I would add is a reminder to reset the ECU by disconnecting the battery for a few minutes. Those new sensors you replaced are begging to be calibrated.
Yep did that didn't help still doing what it does. But now that our weather is warming up here it has stopped cutting out but still the revs drop right down to almost cutting out but goes to 1000rpms till it warms up then drops to about 800 to 780rpms.

The only difference is the gasket the new one came with a grey gasket and I am finding out about a O shaped rubber gasket I think that rubber gasket might still be on there with the new grey gasket will have to go through the pains of removing it again to find out.
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Old 11-18-2013, 11:00 AM   #9
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don't bother - if the gasket were to blame, you'd be having crappy idle all the time, not a one-off problem that goes away after a restart.

Many of the folks on this forum have complained that their aftermarket IAC valve was faulty. Some brands seem to be better than others, but I don't remember them; you might have some luck if you use the forum search box. The expensive Motorcraft part might be your only option, unless you want to gamble with a junkyard part. Alot of us (me included) fixed the problem by cleaning & reinstalling the old IAC.


Quote:
Originally Posted by FordFocus2002 View Post
But now that our weather is warming up
don't say that, now I hate you. yesterday we had rain+70mph winds and tonight our temperature is predicted to drop to -2C.
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Old 11-18-2013, 06:51 PM   #10
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You can run the paper gasket on top of the rubber one and runs fine, don't screw with it. Everybody thinks there is no gasket on it; 9 times out of 10 it sticks to the intake.
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