Engine - Hesitation/Surge/Loping

85ford02

Article No. 85-2-8

HESITATION - 5.0L CFI - HIGH AMBIENT COLD START/DRIVE


HESITATION - 5.0L CFI - DURING ACCELERATION - WARM


IDLE LOPING (ROLL) - 5.0L CFI - COLD START AND TRANSMISSION ENGAGEMENT


SURGE (NERVOUS SHUDDER) - 5.0L CFI - DURING ACCELERATION - WARM

LINCOLN-MERCURY 1985 CONTINENTAL, MARK VII

CALIBRATIONS: 5-22D-Rl0, 5-22R-R0

The subject conditions may be caused by lean fuel/ air ratios and can be serviced by installing a restrictor in the EGR valve vacuum line to reduce EGR and by adjusting the pressure regulator to increase fuel pressure.

Figure 9:

Check the vacuum source at EGR valve for the presence of a yellow plastic connector with a .030" restrictor. If no yellow connector is present, install the connector, part no. D9ZZ-12A225-A, as shown in Figure 9.

Check the fuel pressure regulator can on the throttle body for a "black ink" mark on top of the can or part no. E55E-9C973-EB, located at rear of throttle body assembly. If the regulator can/throttle body does not contain either the black mark or the part number shown above, adjust the fuel pressure at the regulator as follows: Remove the plug at the top of the regulator and turn allen screw two turns clockwise. Install a new plug, part no. E0AY-9E938-A.

PART NUMBER PART NAME CLASS

D9ZZ-12A225-A Vacuum Restrictor BM
E0AY-9E938-A Plug Restrictor C

OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: Reimbursable within the provisions of the Warranty and Policy Manual.
OPERATION: SP9973A84 (Restrictor)
TIME: 0.3 Hr.

OPERATION: SP9973B84 (Restrictor/Regulator adjust)
TIME: 0.4 Hr. DLR. CODING: Basic Part No. DRIVE Code: P2