Fuel

You filled the tank and the needle did not move — or it drops in jumps. Usually a stuck float in the tank, but there is an unpleasant consequence peop

These codes do not merely say «the mixture is wrong» — they say where and when: at idle or under revs, on bank one or bank two. That detail cuts the s

The code names the cylinder — and that is half the job done. How to tell a dead injector from a broken wire without removing anything.

The car jerks under load and dies on a climb. How to tell a tired pump from a blocked filter and from the sensor simply lying.

Fitted LPG and the light came on. Usually the engine is not broken — the two systems are not agreeing. Which codes are expected and which are not.

The car got worse after a fill-up. Here is how to tell bad fuel from coincidence.

Three codes whose culprit costs nothing in a third of cases and is fixed by hand in five seconds.

«System too lean» is the most common entry in the engine memory. The cause is almost never the part people suspect first.