Ateca 150TSI Fuel consumption spike

Faults and Technical chat for the Seat Ateca
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Posts: 5
Joined: Sun Feb 09, 2020 5:28 pm

Ateca 150TSI Fuel consumption spike

Post by Mihai190 » Mon Feb 10, 2020 7:05 pm

Hi everyone,

I was hoping I could get some advice on a problem that started about a week ago.

Here is my issue:

I get in my car at noon, and the consumption in the dash goes crazy. (It is in l/100km) Starts going up on its own for no reason. (see video below) I initially thought I had a burst fuel hose so I check underneath the car and I see the blue stripe in the picture below.

Now, ever since I am getting about 25mpg when I used to get about 38 on my petrol.

Also, when idling and stationary, the consumption shows 50mpg

Any thoughts? I will take it to the dealership in the very near future, just want to know what you think may be causing this. The car is a 68 plate Ateca 1.5 Tsi and it went to the dealership before to get the kangarooing issue sorted out.

Video link of consumption going crazy

Picture of bit found under car

Posts: 281
Joined: Mon Aug 20, 2018 2:31 pm

Re: Ateca 150TSI Fuel consumption spike

Post by Rory » Tue Feb 11, 2020 10:32 am

Fuel consumption is calculated by the ECU based on the number of injection pulses - there's no flow meter etc measuring the fuel itself. So if the numbers are all over the place it implies some issue with the way the car is running.
Ateca SE-L 1.0TSi - Sept 18 - daughter's
Tiguan Match 2.0TDi 4Motion DSG - Sept 15 - wife's
Thinking about something with 7 seats to replace my old Mercedes C270CDi Estate

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