Apparatuses and processes for aperturing and stretching a web are disclosed. The method is effective in preventing start-failures in multi-valve, low friction, spark-ignited engines. A second collar of the bottom portion has a depressible product channel member with a nozzle positioned adjacent the second collar. An air outlet temperature sensor detects a temperature of air downstream from the evaporative media and provides an air outlet temperature signal indicative thereof. A determination may also be made whether the received transmission was reliable. The economizer may comprise a housing having a main flow duct defining a main flow passage in which the damper is located, a pair of conduits opposing one another across the main flow duct and defining respective reverse flow passages, and a pair of return channels opposing one another across the main flow duct and defining respective return flow passages.