Ford Freestar 2004 User Manual

Evaporative Emissions
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The EVAP running loss system leak test:
 utilizes intake manifold vacuum to test the system and involves several stages.
Evaporative Emission System
Principles of Operation
Evaporative Emission (EVAP) Canister Purge Valve
The EVAP canister purge valve is controlled by the powertrain control module (PCM). The EVAP canister purge valve controls the flow of fuel vapors from the EVAP
canisters to the engine intake manifold during various engine operating modes. The EVAP canister purge valve is normally closed.
Evaporative Emission (EVAP) Canisters
SECTION 310-00: Fuel System 2004 Freestar/Monterey Workshop Manual
DIAGNOSIS AND TESTING
Procedure revision date: 07/31/2003
Special Tool(s)
Worldwide Diagnostic System (WDS)
418-F224
New Generation STAR (NGS) Tester
418-F052, or equivalent scan tool
Evaporative Emission System Leak Tester
310-F007 (134-00056) or equivalent
Item Part Number Description
1 9030 Fuel filler cap
2 9C052 Fuel tank pressure sensor
3 9B190 RIU limit vent valve
4 9C915 Evaporative emission canister purge valve
5 9F945 Canister vent solenoid
6 9B328 Evaporative emission dust separator
7 9D653 Evaporative emission canister
8 9002 Fuel tank
9 9B593 Fuel vapor vent valve
10 9189 Fuel filler pipe check valve
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2004 Freestar/Monterey Workshop Manual
10/9/2010
http://www.fordtechservice.dealerconnection.com/pubs/content/~WS4W/~MUS~LEN/20/
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Ford Freestar 2004 Specifications

General

Brand	Ford
Model	Freestar 2004
Category	Automobile
Language	English

Summary

Evaporative Emissions

Special Tool(s)

Lists specialized tools required for EVAP system diagnosis and testing.

Principles of Operation

Explains the function of EVAP system components and overall operation.

Inspection and Verification

Visual Inspection Chart

Provides a checklist for visually inspecting the EVAP system for damage.

PCM Diagnostics Trouble Code (DTC) Index

Lists EVAP system DTCs and their corresponding pinpoint tests.

Symptom Chart

Helps diagnose EVAP issues based on reported vehicle symptoms.

Pinpoint Test A: Small Leak in EVAP System

Step-by-step diagnostic procedure for DTC P0442 (small EVAP leak).

Pinpoint Test B: Major Leak or No Flow Detected

Diagnostic procedure for DTC P0455 (major EVAP leak) and P1443 (no purge flow).

Pinpoint Test C: Excessive Vacuum in Fuel Tank

Diagnostic procedure for DTC P1450 (excessive fuel tank vacuum).

Pinpoint Test D: Hiss When Opening Fuel Cap

Diagnostic procedure for EVAP system issues related to fuel cap operation.

Pinpoint Test E: Excessive Fuel Odor

Diagnostic procedure for issues causing excessive fuel odor in the EVAP system.