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Old 11-22-2013, 03:13 AM   #1
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Weird idle, 2005 Focus ST

Hey everyone, I was just wondering if this is normal for the 2.3 Duratec. When I put the clutch in and just coast, my RPM's don't really drop. In my Subaru as soon as i put in the clutch the RPM's drop down pretty quickly. It just feels like something isn't kicking down idle wise.

Temp is normal, i wonder if something is clogged so the fast idle isn't dropping.

Any input would be helpful.


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Old 11-22-2013, 07:41 AM   #2
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Originally Posted by subieracer View Post
Hey everyone, I was just wondering if this is normal for the 2.3 Duratec. When I put the clutch in and just coast, my RPM's don't really drop. In my Subaru as soon as i put in the clutch the RPM's drop down pretty quickly. It just feels like something isn't kicking down idle wise.

Temp is normal, i wonder if something is clogged so the fast idle isn't dropping.

Any input would be helpful.
Does the rpm drop down later or not? Mine does, but have a tune also.
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Old 11-22-2013, 11:42 AM   #3
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So I did a ton of searching last night and it's more commonly called a "hanging idle". some people say that's just how the car is because of some emissions settings, other's say it was a vacuum leak but never say which hose was leaking so not much help there. Think just to be safe I'm gonna hook up the smoke machine and see if I have any leaks.
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Old 11-22-2013, 05:16 PM   #4
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Old 11-22-2013, 06:09 PM   #5
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The "hanging idle" for emissions is most noticeable when you take your foot off & let it slow down in gear. It'll coast along for a bit, THEN start decelerating more under engine braking.

Once I installed a cluster with a tach., I noticed a rev. bump b4 dropping with "normal" shifting. Found I had to get off the throttle a touch earlier than normal for me to get it to drop more normally for shifting.

If it just hangs there, other than as I described as typical, it's worth looking for an issue.

Luck!
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