Engine - Hard Start/Knock/Stall/Rough Idle

91ford22

Article No.
91-14-12

07/11/91


^ HARD START - 2.3L - WATER IN EGR SYSTEM - VEHICLES WITH MANUAL TRANSMISSION

^ IDLE - ROUGH - 2.3L - WATER IN EGR SYSTEM - VEHICLES WITH MANUAL TRANSMISSION

^ SPARK KNOCK - 2.3L - WATER IN EGR SYSTEM - VEHICLES WITH MANUAL TRANSMISSION

^ STALL DECEL - 2.3L - WATER IN EGR SYSTEM - VEHICLES WITH MANUAL TRANSMISSION


LIGHT TRUCK: 1989-91 RANGER


CALIBRATION: 9-49F R00 (1989), 9-49S R00 (1989), 9-49F R00 (1990), 0-49S R00 (1990), 0-49T-R10 (1990), 0-49S R00 (1991), 0-49S R10 (1991)

WARNING: THIS MODIFICATION IS AUTHORIZED ONLY FOR THE LISTED ENGINE. PERFORMING THIS MODIFICATION ON OTHER ENGINE CALIBRATIONS IS UNAUTHORIZED AND COULD CREATE LIABILITY UNDER APPLICABLE FEDERAL OR LOCAL LAWS.

ISSUE: Intermittent operation or failure of the EGR vacuum regulator solenoid (EVR) may be caused by water in the EVR and/or the vacuum hoses that are connected to the EVR. The driveability symptom(s) may be intermittent and may not be present at the time of the repair. Self test codes 33, 34 and 35 may be stored in continuous Self Test memory.

ACTION: Check the EVR and the EGR system vacuum hoses for water or moisture. If no water is found, follow the diagnostic procedure outlined in the Engine/Emission-Diagnosis Manual. If evidence of water is found, refer to the following procedures for service details.

Figure 1:

Figure 2:

1. Disconnect the vacuum hoses from the EVR and the Exhaust Gas Recirculation Valve (EGR). Blow the hoses out with shop air. For EVR location, Refer to Figure 1.


2. Disconnect the Thermistor from the EVR solenoid. Refer to Figure 2. Remove the (2) two mounting screws that hold the EVR solenoid to the right side inner fender.

3. Install the new service EVR solenoid using the original mounting screws.

NOTE: THE NEW SERVICE SOLENOID MUST BE MOUNTED IN AN INVERTED (UPSIDE DOWN) POSITION. REFER TO FIGURES 1 AND 2.

4. Install the original Thermistor on the new EVR solenoid. Refer to Figures 1 and 2.

5. Install the vacuum hoses on the EVR solenoid and the EGR valve.

NOTE: WHEN INSTALLING THE VACUUM HOSES, MAKE SURE THERE ARE NO SHARP BENDS OR KINKS IN THE HOSES.

6. Clear code from continuous Self Test Memory.

7. Re-Run Self Test and verify that pass codes are received.

PART NUMBER PART NAME CLASS

F1TZ-9J459-B EGR Vacuum Regulator (EVR) C





Obtain an Authorized Modifications Decal and list the date, dealer number, and summary of alterations performed. Select a prominent place adjacent to the Vehicle Emission Control Information Decal suitable for installing the Authorized Modifications Decal. Clean the area, install the decal, and cover it with a clear plastic decal shield.


OTHER APPLICABLE ARTICLES: NONE
WARRANTY STATUS: Eligible Under Basic Warranty Coverage, Emissions Warranty Coverage
OPERATION DESCRIPTION TIME
911412A EGR Vacuum Regulator 1.2 Hrs.
(EVR) - Replace
DEALER CODING
BASIC PART NO. CONDITION CODE
9J459 09
OASIS CODES: 602300, 607700, 608000, 608400, 615000