Polo Classic 1.9 TDI rpms

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sanelenanti
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Polo Classic 1.9 TDI rpms

Post by sanelenanti » Thu Mar 08, 2018 9:51 pm

Hi everyone. The rpms on my Polo Classic 1.9 TDI always sit at 10 regardless of where the engine is cold or hot. Any advice's and pointers are appreciated. What is the normal rpm level when cold and when hot.
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Ashveer03
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Re: Polo Classic 1.9 TDI rpms

Post by Ashveer03 » Fri Mar 09, 2018 1:03 am

903rpm, havnt really noticed a high idle when cold..

Common cause of this is a broken alternator wire (trace it from the alternator to around the starter area where it normally breaks)

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Re: Polo Classic 1.9 TDI rpms

Post by TDi4Life » Fri Mar 09, 2018 1:03 am

sanelenanti wrote:Hi everyone. The rpms on my Polo Classic 1.9 TDI always sit at 10 regardless of where the engine is cold or hot. Any advice's and pointers are appreciated. What is the normal rpm level when cold and when hot.
Howzit man.. mine usually sits at around 900rpm when it's warm (maybe slightly lower) but there's a clear difference between when it's hot and when it's cold.. not sure what your issue could be but try and do diagnostics first and take it from there..

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sanelenanti
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Re: Polo Classic 1.9 TDI rpms

Post by sanelenanti » Sun Mar 11, 2018 9:28 pm

Thanks for your replies. I have then checked for broken wires as suggested but unfortunately I couldn't find anything. One mechanic said it's the airflow meter sensor, what he did he started the car and disconnected the sensor while the engine is running and he was expecting the sound to change which did not happen, it's when he said the sensor isn't doing it's job. Please advise if this theory is correct before I replace a sensor that is working.
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Re: Polo Classic 1.9 TDI rpms

Post by Deezo777 » Mon Mar 12, 2018 12:13 am

sanelenanti wrote:Thanks for your replies. I have then checked for broken wires as suggested but unfortunately I couldn't find anything. One mechanic said it's the airflow meter sensor, what he did he started the car and disconnected the sensor while the engine is running and he was expecting the sound to change which did not happen, it's when he said the sensor isn't doing it's job. Please advise if this theory is correct before I replace a sensor that is working.
Check your car to see if u have a battery light on your dash...my car had this problem and as ashveer said it was a broken wire leading to alternator

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sanelenanti
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Re: Polo Classic 1.9 TDI rpms

Post by sanelenanti » Mon Mar 12, 2018 1:34 pm

No warning lights on the dashboard, even diagnostic machine does not register any faults. One other thing that I noticed this morning, when I started the car the rpms were sitting slightly below 9 for 5 seconds or so then back to 10.
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Ashveer03
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Re: Polo Classic 1.9 TDI rpms

Post by Ashveer03 » Mon Mar 12, 2018 1:54 pm

When u out the key on, BEFORE starting the car. Does the battery light come on?

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sanelenanti
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Re: Polo Classic 1.9 TDI rpms

Post by sanelenanti » Mon Mar 12, 2018 3:24 pm

Yes the battery light comes on and switch off once the car starts.
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Ashveer03
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Re: Polo Classic 1.9 TDI rpms

Post by Ashveer03 » Mon Mar 12, 2018 5:36 pm

Gonna have to read scan data and look for anything unusual..

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Re: Polo Classic 1.9 TDI rpms

Post by sanelenanti » Mon Mar 12, 2018 6:23 pm

Any recommendations around Pretoria?
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