Festiva L4-81 1.3L SOHC (1988)
Technical Service Bulletin # 91167
Date: 910807
Engine - Hesitation On Acceleration/Surge While Driving
Article No. 91-16-7
08/07/91
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HESITATION - 1.3L - NOT ENOUGH DISTRIBUTOR ADVANCE - CARBURETED ENGINES BUILT BEFORE 11/15/88
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SURGE - 1.3L - NOT ENOUGH DISTRIBUTOR ADVANCE - CARBURETED ENGINES BUILT BEFORE 11/15/88
FORD:
1988-89 FESTIVA
This TSB article is being republished in its entirety to update the instructions for filling out the authorized modification decal. All prior TSB'S for this fix
are superseded by this publication.
ISSUE:
Hesitation during acceleration or a surge while driving at a steady speed may be caused by insufficient distributor spark advance, excessive
EGR flow and fuel getting into the distributor vacuum advance manifold port.
ACTION:
Modify the distributor and EGR system by installing the applicable special service kits identified in the parts block. Refer to the service
procedure that applies to the vehicle application. Check to see if the procedure outlined in TSB 88-10-8 has been done for 1988 vehicles.
FOR THOSE VEHICLES THAT HAVE BEEN RETURNED FOR SERVICE WITH THE EGR NONFUNCTIONAL AFTER APPLICATION OF A
PRIOR VERSION OF THIS TSB (TSB'S 88-10-8, 89-25-5, 90-2-3), UPDATE THE MODIFICATION DECAL WITH
THE FOLLOWING NOTE: PER TSB 91-16-7 THE EGR WILL NO LONGER FUNCTION AND EGR GAS WILL NOT FLOW.
NOTE: CALIFORNIA VEHICLES HAVE AN EGR VALVE POSITION (EVP) SENSOR MOUNTED TO THE TOP OF THE EGR VALVE AND
THE VEHICLE EMISSION CERTIFICATION INFORMATION LABEL IS NOTED FOR CALIFORNIA EMISSIONS CERTIFICATION.
NOTE: VERIFY THE BUILD DATE OF THE VEHICLE BY REFERRING TO THE BUILD DATE STAMPED ON THE VEHICLE
CERTIFICATION LABEL ON THE DRIVER'S SIDE "B" PILLAR FACE. ALL 1988 AND 1989 CARBURETED UNITS BUILT BEFORE
NOVEMBER 15, 1988 ARE AFFECTED.
1988 - 49 State and Calif Vehicles With TSB 88-10-8 Completed
1.
Inspect the vehicle and review the service file to determine if TSB 88-10-8 has been done to the car. Look for the following.
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The authorized modifications decal near the VECI label
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A red and black EGR delay valve
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The part number DX02 on a 49 state vehicle or DX05 on a California vehicle appearing on the lower left corner of the VECI label.
If any or all of these indicators are found, the car has had TSB 88-10-8 done and needs only a new distributor vacuum advance and a fuel migration kit
installed.
2.
Obtain special service kit (E9PZ-12370-A) for a 49 state calibration vehicle or (E9PZ-12370-B) for a California vehicle. Obtain a distributor
vacuum advance unit (E9BZ-12370-C).
3.
Open kit (E9PZ-12370-A) or (E9PZ-12370-B) and remove the contents.
a.
Determine if the vehicle is a 49 state or California calibration by referring to the information covered in the note above.
b.
Look at the part number in the lower left corner of the new VECI label in the kit. (The 1988 49 state VECI label is identified by a DX03 code
and the 1988 California VECI label is identified by a DX07 code.)
c.
Throw away the extra label. (1989 49 state - DX01G) (1989 California - DX08)
