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Classic Mini Spi Idles Fluctuate


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#16 genpop

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Posted 18 June 2025 - 03:59 AM

sorry, this is an open forum, others are interested too



#17 mnr47

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Posted 18 June 2025 - 03:06 PM

I get below error when attaching the log file here, hence why I uploaded to google drive. 

 

Error You aren't permitted to upload this kind of file

 

 

Also i didn't notice when i upload to google drive, it was under only me view which I have open it to public view now.


Edited by mnr47, 18 June 2025 - 03:08 PM.


#18 mnr47

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Posted 18 June 2025 - 03:10 PM

with "More Reply Options" you may post the logfile here.

 

 

 

Google Drive: "You need access", meaning that the file is not publicly accessible.
 

 

 

 

I get below error when attaching the log file here, hence why I uploaded to google drive. 

 

Error You aren't permitted to upload this kind of file

 

 

Also i didn't notice when i upload to google drive, it was under only me view which I have open it to public view now.



#19 NLinPEN

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Posted 18 June 2025 - 03:29 PM

I get below error when attaching the log file here, hence why I uploaded to google drive. 

 

Error You aren't permitted to upload this kind of file

 

 

Also i didn't notice when i upload to google drive, it was under only me view which I have open it to public view now.

Yes, I can confirm: now the file is open for viewing.



#20 genpop

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Posted 18 June 2025 - 04:14 PM

Very serious fault.First thing i guess you have a 82 degree thermostat in it.Water reaches only 85 therefore no closed loop,but this could be the only 5 minutes runingtime. Test that wiith10 minutes.

The more misty fault is that iac drops normal down but at 16:59 it rises up the first time and at17:10 it rises up much more starting with fluctuating running at16:59. I would check the IAC on cold solderings, there is a thread on the beginning here in the forum.

PS.I suggest using mems rosco like the suggestion for BritOP94 or open the file in excel and make a graph from iac and rpm column.

I have no other idea for this behaviour possible others could see more!



#21 mnr47

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Posted 20 June 2025 - 08:01 AM

Very serious fault.First thing i guess you have a 82 degree thermostat in it.Water reaches only 85 therefore no closed loop,but this could be the only 5 minutes runingtime. Test that wiith10 minutes.

The more misty fault is that iac drops normal down but at 16:59 it rises up the first time and at17:10 it rises up much more starting with fluctuating running at16:59. I would check the IAC on cold solderings, there is a thread on the beginning here in the forum.

PS.I suggest using mems rosco like the suggestion for BritOP94 or open the file in excel and make a graph from iac and rpm column.

I have no other idea for this behaviour possible others could see more!

I am using 76c thermostat and I can confirm the system goes into close loop.

I manage to solve the Intake Temp sensor fault which was caused by the socket/wire faulty. As per below latest screenshot.
 

Attached File  WhatsApp Image 2025-06-20 at 3.59.18 PM.jpeg   36.98K   0 downloads

Attached File  WhatsApp Image 2025-06-19 at 9.11.20 PM.jpeg   26.93K   0 downloads

Attached File  WhatsApp Image 2025-06-19 at 9.11.19 PM.jpeg   18.92K   0 downloads

 

Attaching the latest log file as well.

 

https://drive.google...iew?usp=sharing



#22 genpop

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Posted 20 June 2025 - 09:13 AM

First of all, you need not quote every answer.

Intake air temperature ist the smallest parameter for a good running engine.In any case good that you found that!

The fault is still at the IAC side.Visualize your logfile in a graph and you will see yourself!






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