09' Daytona - Idle speed - Triumph675.Net Forums
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post #1 of 5 Old 06-28-20, 05:43 Thread Starter
SilverJan
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09' Daytona - Idle speed

Hello, everyone,

I know, there are already some threads about idle speed, but unfortunately I couldn't find one that had the symptoms of my machine exactly right

When I let my Daytona (throttled to 48hp) run again after many months (~10), I noticed that the idle was much too high. It fluctuates in idle between 1700 and 2200 revolutions. Always up and down without any pattern.

Investigated error causes:

- TPS Sensor: I have already reset it with TuneECU, turned on the machine, waited 10mins and unfortunately didn't get a green check mark for the TPS synchronization. Did that work? No idea. Here is a video which I made after doing a TPS reset:
- Cooling water: I have already changed and vented it. Didn't help.

More ideas (which are circulating in the internet):

- Temperature sensor: Works fine in the speedo and TuneECU. Can there really be problems here?
- TuneECU original map new "flashing
- Screw down TuneECU speed manually and "flash" it
- Adjust idle speed manually and with TuneECU
- Check the vacuum hose -> If you only knew where?

Who can give me a tip where to start first?

Cheers
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post #2 of 5 Old 06-28-20, 09:28
rokerr
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I might wonder if you’re thinking too hard on this one. Could it be as simple as a large vacuum leak? As long as the butterflies are closed, it couldn’t be much else


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post #3 of 5 Old 06-29-20, 02:05
Unicycle Santa
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How does it run when you rev it or blip the throttle? When I put mine back together I forgot to hook up the vacuum line to the small sensor on the back of the airbox, and my idle was all over the place and it would die randomly. Also got a check engine light.

Garage: '06 Daytona 675, '08 WR250X, '15 VW Golf GTI
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post #4 of 5 Old 06-29-20, 13:41
Stephen Pilsworth
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Has the metal bit where the idle stepper motor arm goes through got stuck?

Had it happen on mine, just remove the idle stepper motor and give the metal bit some wd40 and a wiggle

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post #5 of 5 Old 06-30-20, 09:57 Thread Starter
SilverJan
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Thanks guys, I will check out all the options. I have not checked the fuel injection system / throttle positioning until now and was searching for some software-related issues.

Will update here once I have checked the options!
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