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Automotive Technology: A Systems A...

6th Edition
Jack Erjavec + 1 other
ISBN: 9781133612315

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BuyFindarrow_forward

Automotive Technology: A Systems A...

6th Edition
Jack Erjavec + 1 other
ISBN: 9781133612315
Textbook Problem

When the throttle plates are closed in a port injection system, where does the air needed for idle speeds come from?

To determine

The air needed to comes from_______, when the throttle plates are closed in a port injection system.

Explanation

In a PFI (Port Fuel Injection) under idle engines’ condition, if the throttle plates are closed, a small quantity of air is allowed to enter into the system through the idle air orifice. Under such a condition the PCM (power-train control module) controls the speed of the system, which on the requirement of additional air give commands the IAC (Idle air control) system...

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