6R 1.6 TDI Winter problems

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formpolo
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Posts: 1
Joined: Sat Feb 20, 2021 12:21 pm
Drives: 1.6 TDI
Location: Scandinavia

6R 1.6 TDI Winter problems

Post by formpolo »

Hi,
I have tried to search for this problem everywhere but cant find a solution.

Short story: 1.6 TDI CAYB 90 HP Tuned. Have to try to start 5-10 times before car starts, can it be EGR/DPF? Anything else I should check?

Long story:
I have a Polo Cross 1.6 TDI(4-cyl. turbo dies. eng. 1.6 l). Previous owner tuned the car to stage 1 i think(dont know if this is relevant for problem).
Problem occurs in cold weather(-5 and lower). When trying to start car the car tries to start but dies pretty fast. It does not respond to the throttle during this period. I have changed the battery so i am excluding this as a problem. I have to try to start the car 5-10 times before it starts up. After starting the car it has no problems driving, and feels normal. Event after turning it off it will start up without any problems. Can this be a problem related to EGR/DPF?
amer6R
Platinum Member
Posts: 1104
Joined: Thu Feb 06, 2020 7:57 am
Drives: Polo 6R 2010 1.6 TDI
Location: budget build

Re: 6R 1.6 TDI Winter problems

Post by amer6R »

Well it can be all sorts of problems, have you tried ignition on for 7-10s to give the glow plugs time to heat up?

Yes it can be the egr, but also dirty fuel filter
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iichel
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Joined: Fri Nov 14, 2014 2:14 pm
Drives: Polo 6R 2.0 TDI, Passat B8 2.0 TSI
Location: http://mypassat.nl/

Re: 6R 1.6 TDI Winter problems

Post by iichel »

Could be just about anything. Glow spirals, fuel related (HPFP, HP sensor, filter, injector), EGR, DPF, you name it.
CarbonChaos
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Joined: Mon Sep 03, 2018 9:43 pm
Drives: 2015 6C GTI DSG Oryx white 3 door.
Location: South west uk

Re: 6R 1.6 TDI Winter problems

Post by CarbonChaos »

Could be fuel filter or connection sucking in air over night leading to extended cranking time ?
jiimien
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Joined: Mon Mar 09, 2020 5:48 pm
Drives: 6R 1.6 TDI
Location: Denmark

Re: 6R 1.6 TDI Winter problems

Post by jiimien »

Is it only when its -5 or lower? or just worst at those temps
Botanic
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Drives: Unicycle
Location: Stockholm

Re: 6R 1.6 TDI Winter problems

Post by Botanic »

I had the exact same symptoms on my previous VW Lupo. Replacing the coolant temperature sensor solved the issues.
It is quite common that the coolant sensor fails on Lupos (I had to replace it twice during the 11 years I had the car).
I have no idea if the sensors have gotten better since.
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