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Old 06-13-2013, 03:18 PM   #1
cadman33619
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high idle while shifting

I'm having an issue with the idle staying high (approx 3000 rpm) while shifting. Sometimes it even jumps higher while shifting. I've been to 2 repair shops. they did not fix it but charged plenty to clean this and replace that. this past monday i dropped it off at the Ford dealer and gave them the repair records from the other mechanics that outlined exactly what they did. The ford dealer did all the same things and told me "its designed to stay high so that shifting is smoother". there is absolutely no change...its exactly the same as when i brought it to them. I called them and told them I'm taking it back today and that i'm not happy that i paid so much money ($455.28) and see no change at all.

heres what they did:
PERFORM AIR/FUEL INDUCTION SERVICE $139.95
CUSTOMER STATES THE IDLE RACES WORSE BETWEEN SHIFTING ///// ADVISE HAS HAD 2 IAC REPLACED
DIAG REPLACE 02 SENSOR AND PCV VALVE
Amounts Due
Customer Pay: $ 455.28

the pcv and IAC and throttle body were done by the first 2 mechanics. but Ford did it all again. then told me that the IAC that was used is an aftermarket and is not very good and could cause the problem as well..and that i should replace it with a Ford brand IAC. the IAC that was used came from NAPPA Auto parts.

I'm at a loss...i'm sure the ford dealer will now charge me another heap of money to clean/replace more parts.

I'm hoping someone out there has had experience with this that can help

thanks


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Old 06-13-2013, 03:42 PM   #2
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How long does it stay at "high idle"? The rpms do hover and slowly drop for emissions purposes. This is normal. If it stays there for more than 2 seconds before slowly dropping that would suggest maybe a sticking IAC... or bad TPS...

Also, If your accelerating heavily and you just pop the clutch off yes, the rpms will go up because you are relieving stress off of an engine that just a second ago was accelerating.
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Old 06-13-2013, 03:51 PM   #3
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def longer than 2 seconds. with quick shifts and when i take my time. The IAC was replaced by the first mechanic...then the second mechanic called nappa and had it replaced again under warranty. so it was repalced 2x.
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Old 06-13-2013, 09:01 PM   #4
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Does it do the same thing at 4,5,6k upshifts? Or do the revs instantly drop?

I had the same complaint, but I realized it's just how the Focus is set up. Revs hang under 3k. Don't waste your money - adapt instead. You have these options:

1) Ignore
2) Shift slower so that you get off the gas, pause, and then clutch in to shift.
3) Shift really really fast, so that the revs don't have time to jump up.

I use a mixture of all 3 of these depending on my mood.
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Old 06-14-2013, 08:04 AM   #5
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well...i just dropped it off again at the dealer...i told them its still not right and that i'm pretty upset that i paid 455.00 and theres no change at all. that was before I read Neptune15's post.

even over 3k it hangs..and still jumps higher a little during the shift.
at 4k it does the same. hangs there...whether i shift fast or slow. I've never really gotten up to 5k...and def not 6k (afraid I'll go back to the future) even jumping on the interstate doesn't take the rpm's up that high for me. the excuse i'm getting now from the dealer is the aftermarket IAC valve. They're telling me that if it has a "ford made" IAC that it would be better. Is that true? I find that hard to believe. The one thats in there came from Napa auto parts and has been changed twice (both from napa). That valve is over 300.00 plus labor. thats on top of the 455.28 i just paid them...and theres no change at all.

do i really have to live with it not knowing for sure if thats normal?
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Old 06-14-2013, 11:09 AM   #6
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Minor "Hanging revs", or a jump in rpm when the clutch is disengaged, is the "normal" operation mentioned earlier. On my own I had to retrain myself to get off the gas JUST B4 depressing the clutch to avoid the RPM jump. BUT, when normal, it then drops fairly quickly.

A number of issues can cause the "hanging rpm" issue. I don't have time right now to search the old threads to remind myself of ALL of them, or to type them out (sorry).

If you do a search of this area, from the search function at the top of the page (search page function), "hanging rpm" or "hanging revs" will get you a lot of info. to look at.

Luck!
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Old 06-15-2013, 04:10 PM   #7
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If I recall correctly the main cause is an emissions system. Someone can correct me if I'm being wrong here.

When you let off the gas, there's a bit of fuel still being sent to the cylinders for a few hundredths of a second. The emission system ignites the fuel to make sure there is complete combustion of all these gas particles, causing these jumps and hangs.
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