Idling issues

by **score1_uk** » Sun Apr 12, 2009 7:12 pm

Ok, so I start the Focus RS and the revs jump to around 3k for say 20-25 seconds, then fall as if to settle at 900 or so, but dips just a bit low and tends to stall.

I start again and sometimes its fine, others I have to tweek the throttle as the revs fall then the car idles fine.

Any ideas? I have heard that resetting the ECU can solve this but wouldnt have a clue how.

by **Taggart** » Sun Apr 12, 2009 7:22 pm

Wouldn't you just disconnect the battery for 15 mins or so to reset the ECU?

by **Mallaby106** » Sun Apr 12, 2009 9:13 pm

Idle air control valve?
Air flow meter?
Am i talkin sh*t?

by **tree** » Mon Apr 13, 2009 2:26 am

yeah idelc control valve soudns like or possible MAF/MAP issues. More likely idel control... they just get gunked up. quick clean often solves the problem.

reseting the ECU disconect the battery for a good hour should do it.

by **score1_uk** » Mon Apr 13, 2009 10:22 am

Clean the MAF sensor? Is that the 1 next to the air box? What do i need to clean it?

by **tree** » Mon Apr 13, 2009 11:32 am

ah sorry wasnt very clear there. i meant clean out the idle control valve.
Cant really clean MAFs, they just becoem defective.

I usually use wd40 to clean it out and a rag to wipe junk off depending on howmuch crap has accumulated

by **score1_uk** » Mon Apr 13, 2009 11:52 am

where will i find the control valve?

by **Taggart** » Mon Apr 13, 2009 11:59 am

I'd tend to use carb cleaner first, then some WD40.

You should find the ISV nearish the throttle, with some hoses that bypass the throttle.

by **score1_uk** » Mon Apr 13, 2009 12:11 pm

Hummm, If I take a pic of the engine bay could some1 point it out?

by **Mallaby106** » Mon Apr 13, 2009 12:13 pm

Go for it

Idling issues

Idling issues

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