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>At 12:57 AM -0400 9/19/97, ZZZxxaa@aol.com wrote: >>My son has a 1968 FI FB but it's missing the pressure switch just off the >>right side of the center intake manifold. The car runs so-so but was able >to >>pass CA smog. What is the purpose of the switch and how does it affect the >>overall FI process? This switch does the job of the more complex throttle position sensor of later models: it makes the mixture richer when you punch the gas. Does the car respond poorly when you floor it? -Greg '69 & '71 Squarebacks '63 Beetle