<Ul> <Li> Contact breaker </Li> <Li> Magneto </Li> <Li> Distributor </Li> <Li> Electrical ballast </Li> <Li> High tension leads </Li> <Li> Ignition coil </Li> <Li> Spark plug </Li> <Li> Wasted spark </Li> </Ul> <Li> High tension leads </Li> <Tr> <Th> Electrics and engine management </Th> <Td> <Ul> <Li> Air--fuel ratio meter </Li> <Li> Alternator </Li> <Li> Automatic Performance Control </Li> <Li> Car battery (lead--acid battery) </Li> <Li> Crankshaft position sensor </Li> <Li> Dynamo </Li> <Li> Drive by wire </Li> <Li> Electronic control unit </Li> <Li> Engine control unit </Li> <Li> Engine coolant temperature sensor </Li> <Li> Glow plug </Li> <Li> Idle air control actuator </Li> <Li> MAP sensor </Li> <Li> Mass flow sensor </Li> <Li> Oxygen sensor </Li> <Li> Starter motor </Li> <Li> Throttle position sensor </Li> </Ul> </Td> </Tr> <Ul> <Li> Air--fuel ratio meter </Li> <Li> Alternator </Li> <Li> Automatic Performance Control </Li> <Li> Car battery (lead--acid battery) </Li> <Li> Crankshaft position sensor </Li> <Li> Dynamo </Li> <Li> Drive by wire </Li> <Li> Electronic control unit </Li> <Li> Engine control unit </Li> <Li> Engine coolant temperature sensor </Li> <Li> Glow plug </Li> <Li> Idle air control actuator </Li> <Li> MAP sensor </Li> <Li> Mass flow sensor </Li> <Li> Oxygen sensor </Li> <Li> Starter motor </Li> <Li> Throttle position sensor </Li> </Ul>

On which stroke is the air pressure in the cylinder lowest