Engine - Surging/Bucking During Acceleration

Article No. 86-25-14


SURGING/BUCKING DURING ACCELERATION - 2.3L HSC/HSO AND 2.5L HSC - INTAKE MANIFOLD LOOSE

FORD 1984-86 TEMPO; 1986 TAURUS

LINCOLN-MERCURY 1984-86 TOPAZ; 1986 SABLE

Surging and bucking during acceleration may be caused by a loose intake manifold. A loose intake manifold may damage the intake manifold gasket. To correct this, first check the intake manifold attaching bolts for proper torque. If any of the bolts are loose, replace the intake manifold gasket and relearn the idle speed strategy per TSB 86-12-8 or the Engine Emission Diagnostic Manual, Volume H, Section 4.

NOTE: Canadian calibration (Tempo/Topaz only) - reset idle RPM and propane gain RPM to specification following intake manifold replacement procedure.

PART NUMBER PARTNAME CLASS

E53Z-9439-A Intake Manifold Gasket - BM
2.3L HSO/2.5L HSC
E53Z-9439-B Intake Manifold Gasket - A
2.3L HSC


OTHER APPLICABLE ARTICLES: 86-12-8
WARRANTY STATUS: Reimbursable within the provisions of the Warranty and Policy Manual.
OPERATION: 9424A - Replace intake manifold gasket.
TIME: 2.3 Hrs.
OPERATION: 9500C - Adjust idle speed (Canadian vehicles only).
TIME: 0.3 Hr.
OPERATION: 9500C1 - Propane gain (Canadian vehicles only).
TIME: 0.1 Hr. DLR. CODING: Basic Part No. 9424 - Code: 24