A warning light, small leak, faint rattle, or cracked lamp can sound like the beginning of a routine repair. On some vehicles ...

The Audi A5 has been doing a good job of carrying the spirit of the A4, but the older car is still well worth a look. Audi’s odd-even naming convention ended before it could even begin. The trouble it ...

rusEFI supports both solenoid-type (one or two wires; requires additional fly-back diode) and stepper motor (four to six wires, add-on board required) IAC valves. By default, idle control is in ...

⚠️ Knock (detonation) can destroy an engine quickly. Knock sensing is a safety net that pulls timing when it hears knock — it is not a substitute for a careful, conservative ignition tune. Verify that ...