Engine - Low Power/Hesitation/Stumble
86ford17Article No. 86-10-8
IDLE - STALL/ROUGH/ROLL - 2.3L EFI TURBO
STALL ON DECEL - 2.3L EFI TURBO
LOSS OF POWER/HESITATION/STUMBLE ON ACCELERATION - 2.3L EFI TURBO
OIL CONSUMPTION - 2.3L EFI TURBO
FORD 1983-86 THUNDERBIRD
LINCOLN-MERCURY 1983-86 COUGAR
Idle, deceleration or acceleration concerns may be due to engine oil deposited into the fresh air inlet system through the PCV system closure tube. The oil then gets
Figure 3:
Figure 4:
into the vane meter (downstream) and the throttle body (upstream). The oil might get into these areas due to high crankcase pressures which build up because of an interruption in PCV (Positive Crankcase Ventilation) flow. The interruption in flow could be caused by the location of the speed control system vacuum nipple at the PCV closure tube fitting which connects to the air inlet elbow. (See Figures 3 and 4).
This concern can be minimized by installing a new air inlet elbow with cast-in vacuum nipples. The new elbow should be installed and vacuum connections changed using the following procedure.
1. Locate the compressor air inlet elbow and disconnect the crankcase vent tube (PCV) from the tube connector. (See Figures 3 and 4)
2. Disconnect the vacuum hoses from the tube connector and then remove the tube connector from the compressor inlet elbow. Save the tube connector for installation to the new compressor inlet elbow.
3. Remove the air inlet hose from the inlet elbow.
4. Remove the "EGO" ground wire from the stud on the air inlet elbow. (See Figure 4, upper left insert)
5. Remove both the hex head bolts and the stud holding the inlet elbow to the turbocharger assembly.
6. Discard the old gasket.
7. Install the new compressor inlet elbow (E6SZ- 9C674-A). Use a new gasket. Torque the bolts to 19-29 N-m (14-21 ft.lbs.). Reconnect "EGO" ground wire.
8. Inspect hose for oil and clean before reinstalling. Install the air inlet hose to the inlet elbow. Torque the hose clamp to 1.7-2.3 N-m (1.2-1.6 ft.lbs.).
9. Install the tube connector to the inlet elbow and reconnect the crankcase vent (PCV) tube. (See Figures 3 and 4)
10. Reconnect the vacuum lines to the new nipples on the compressor inlet elbow. If only one connection is needed (non-speed control) then block off or cap the other nipple with a 7/32" rubber cap (382443- S). Also block off the old nipple connections on the PCV tube connector with one or two 7/32" rubber caps depending whether vehicle is speed or nonspeed control equipped. (See insert on Figure 3)
PART NUMBER PART NAME CLASS
E6SZ-9C674-A Cast Air Inlet Elbow C
E3ZZ-9D634-A Gasket B
382443-S Rubber Vacuum Cap BS
OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: Reimbursable within the provisions of the Warranty and Policy Manual.
OPERATION: SP9674A86
TIME: 0.3 Hr. DLR. CODING: Basic Part No. 9C674 - Code: P7 N4, N9, P2