AUTOMOTIVE TECHNOLOGY-NATEF TASK SHEETS
AUTOMOTIVE TECHNOLOGY-NATEF TASK SHEETS
6th Edition
ISBN: 9780135257418
Author: Halderman
Publisher: PEARSON
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Chapter 24, Problem 3CQ

Why do many port fuel-injected engines use long intake manifold runners?

  1. a. To reduce exhaust emissions
  2. b. To heat the incoming air
  3. c. To increase high-RPM power
  4. d. To increase low-RPM torque
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