Idle speed fluctuations

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Idle speed fluctuations

Idle speed fluctuations

Yoshizakura
Junior Member

5

14-04-2023, 03:45 PM

#1

Hi guys. I have a 2007 1.5 petrol daihatsu Materia. I was listening to the engine idling yesterday and it holds its revs nicely for about a minute then goes a little faster for same length of time and keeps fluctuating like this at idle.
Is there a problem somewhere?
What could be causing this?

Yoshizakura

14-04-2023, 03:45 PM #1

Hi guys. I have a 2007 1.5 petrol daihatsu Materia. I was listening to the engine idling yesterday and it holds its revs nicely for about a minute then goes a little faster for same length of time and keeps fluctuating like this at idle.
Is there a problem somewhere?
What could be causing this?

Sparkystav
Administrator

14,683

14-04-2023, 03:55 PM

#2

Is the air con on? Does the fan activate at the same time?

[Image: LexuS-Copy.jpg]

Read my thread here: The Evolution of my Turbo Lexus from NA-Supercharged-Twin Turbo-Massive Single
Please leave your comments.

OutlawJapClub Admin Team

Sparkystav

14-04-2023, 03:55 PM #2

Is the air con on? Does the fan activate at the same time?

[Image: LexuS-Copy.jpg]

Read my thread here: The Evolution of my Turbo Lexus from NA-Supercharged-Twin Turbo-Massive Single
Please leave your comments.

OutlawJapClub Admin Team

Yoshizakura
Junior Member

5

14-04-2023, 04:10 PM

#3

Sparkystav Is the air con on? Does the fan activate at the same time?

I made sure the aircon was off and it happens even when the radiator fan is off.

Yoshizakura

14-04-2023, 04:10 PM #3

Sparkystav Is the air con on? Does the fan activate at the same time?

I made sure the aircon was off and it happens even when the radiator fan is off.

piman2k
Junior Member

21

07-05-2023, 04:55 PM

#4

Does the Rev pitch change quickly, i.e. runs at one speed for a second or so then changes to another for a second or so?

piman2k

07-05-2023, 04:55 PM #4

Does the Rev pitch change quickly, i.e. runs at one speed for a second or so then changes to another for a second or so?

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