Vw Fuel Gauge Wiring - VW T25 / T3 Buyers Guide. General. I have written this guide as an aid to anyone who is thinking of buying a Volkswagen T3 camper van (also referred to as a T25, Vanagon, Wedge or Brick).. VW BUS / VAN / EUROVAN & RIALTA SHOP REVIEWS. The largest VW shop listing anywhere. Fuel injection is the introduction of fuel in an internal combustion engine, most commonly automotive engines, by the means of an injector. All diesel engines use fuel injection by design. Petrol engines can use gasoline direct injection, where the fuel is directly delivered into the combustion chamber, or indirect injection where the fuel is mixed with air before the intake stroke..
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