Buzzing Noise From Electronic Vacuum Regulator

Article No.
96-12-4

06/03/96

^ ELECTRONIC VACUUM REGULATOR (EVR) - "BUZZING" NOISE FROM EVR - 2.0L VEHICLES ONLY

^ NOISE - "BUZZING" - NOISY OPERATION OF ELECTRONIC VACUUM REGULATOR (EVR) - 2.0L VEHICLES ONLY

FORD:
1995 CONTOUR

LINCOLN-MERCURY:
1995 MYSTIQUE

ISSUE:
A "buzzing" noise may be beard from under the hood of the vehicle. This noise may be coming from the Electronic Vacuum Regulator (EVR) and may be due to a flat orifice plate within the EVR contacting the valve seat which creates the noise.

ACTION:
Install a new EVR which has a revised design valve seat. The new EVR should reduce the possibility of a "buzzing" noise. Refer to the following Service Procedure for details.

SERVICE PROCEDURE

NOTE:
DO NOT ATTEMPT TO PERFORM THIS TSB ON 1996 MODEL YEAR VEHICLES AS A VIOLATION OF EMISSION REGULATIONS MAY RESULT.

1. Verify the concern. Disconnect the electrical connector from the EVR. If the noise is related to the EVR, the noise will go away. If the noise does not go away, this TSB does not apply. If the noise goes away, continue with Step 2.

2. Disconnect the vacuum lines and electrical connector (if not already done in previous Step) from the EVR.

3. Remove the two (2) screws that hold the EVR to the bracket.

4. Install a new EVR (F1TZ-9J459-A) in an inverted position (with cap at the bottom of the valve) to the bracket using the two (2) screws.

5. Reconnect the vacuum hoses and electrical connector.

6. Penform the Key On Engine Running test to make sure there are no EGR/EVR system diagnostic codes present.

PART NUMBER PART NAME

F1TZ-9J459-A Electronic vacuum Regulator (EVR)

OTHER APPLICABLE ARTICLES: NONE
WARRANTY STATUS: Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage And Emission Warranty Coverage

OPERATION DESCRIPTION TIME

961204A Replace Electronic 0.4 Hr.
Vacuum Regulator (EVR)

DEALER CODING
CONDITION
BASIC PART NO. CODE
9J459 56

OASIS CODES: 702000, 702100, 702300