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Across 1. name given to electronic devices such as switches and sensors 3. narrows air intake, speeds up air flow and reduces air pressure 8. detonation __________. Caused by ignition malfunction. 9. deadly gas produced in exhaust, carbon ____________ 11. copper coil that produces and electromagnetic field when turned on 13. an area of low air pressure 14. initials of the computer chip that controls fuel injection 17. the heated fuel in liquid form becomes a gas 18. name given to electronic devices such as motors, lights and solenoids 19. another name for the choke valve 21. ridge inside the fuel tank that stops the fuel from surging about 22. modern device fitted to squirt fuel into cylinders

Down 2. part of the carburettor that controls air/fuel intake 4. intake ______ and exhaust _______ (pipes) 5. collective name given to the gasses from the exhaust pipe 6. process that makes the fuel droplets as small as possible 7. older type of device first used to mix fuel and air together 10. type of fuel injection where each cylinder has its own injector 12. strange noise made by engine when fuel system pre-ignites 15. tiny particles of this substance are called soot 16. used to drive old style mechanical fuel pumps 20. when the ratio has too much fuel