High Fuel Consumption

Why does my car have high fuel consumption? This is one of my favorite questions because the internal combustion engine cycle in new vehicles is so complex that it requires constant training and out of the box thinking to approach a solution

Newer vehicles like your Fuel Stratified Injection (FSI)), Turbocharged fuel stratified injection TFSI or HDi (high-pressure direct injection) uses multiple firing sequences and high injector rail pressure to operate and can switch between sequences for the optimum fuel economy. 

Well enough said, what are the common reasons for bad or poor fuel economy. We at DNA Auto Centre cannot list each and every item as the list would go on but let’s take a look at the most important ones


  • Irregular or incorrect service schedules
  • Faulty ignition systems (this is responsible for burning the combustion mixture)
  • Leaking injectors or excessive rail pressure. This includes lower fuel pressure
  • Faulty oxygen sensor (did you know that this is a serviceable item on most cars)
  • Incorrect ignition timing
  • Defective catalytic converters or exhaust systems
  • Defective sensors like mass airflow, MAP, IAT, TPS, ICV and throttle body
  • Faulty engine control module, software program or cylinder shut offs
  • And many more

These in our opinion are the most influential factors that cause High fuel consumption and cause the most amount of damage to not only your pocket but also the environment, renewable resources and your vehicles catalytic converter which is required for emissions control. Now if your vehicle has any one of the following faults getting to its solution would take a lot of testing and fault finding.

Gone are the day when air fuel ratio settings could be performed to rectify these faults. Now an oxygen sensor does this up 4000 times per minute.

The correct air fuel ratio has always been the key to success in an automotive engine. So the next time you feel your vehicle is heavy on fuel consider getting it to a specialist which is DNA Auto Centre and we would gladly assist you.

More info on TFSI & FSI  https://www.audi-technology-portal.de/en/drivetrain/engine-efficiency-technologies/fsi-tfsi-principle 

Pin It on Pinterest

Share This