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Problems starting - When Warm?


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Anyone got any ideas why my Lupo GTi doesn't always start when the engine is warm? I've taken this to a couple of garages now, but non of them have even been able to replicate the fault, let alone fix it! An example I give them is I leave my house, and go to the petrol station (10 minute drive) ignition off, key out, leave it a couple of minutes while I fill up, go to start it again then it wont start (see attached video and try to ignore the beeping). After leaving the ignition off for 5-10 minutes then try and start the car, it'll work. 

The check engine light is on, the fault is apparently the engine temp sensor. However this has been replaced with an OEM part and all wiring has been check with nothing unusual to show.

Any suggestions would be appreciated!

 
 

20180206_171553.mp4

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i would be tempted to change the crank sensor.

doesn't throw a code, would produce this symptom.

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@Rich @mk2

Hi guys, I was talking to a guy over the weekend and he said he had the same problem I'm having but with a 2003 Bora. He said that the error light was coming up and he replaced the sensor multiple times, until he realized there were 2 of the same sensor. One near the radiator and one at the back of the engine. Do you think this could be the same case with my Lupo?

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i have no idea which two sensors he replaced unless he did his fan switch.

crank angle, i once had a lupo with this and had to push it up two flights in a car park once to leave it for a bit.

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to also add to this, I had a mk3 colour concept and i had a small radius i could travel in without having to sit and wait.

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