Engine - Oil Consumption/Detonation/Rough Idle/Stalling
88ford03
^ OIL CONSUMPTION - 2.3L OHC TURBO
^ DETONATION - 2.3L OHC TURBO
^ IDLE - ROUGH AND ROLL - 2.3L OHC TURBO
^ STALL - DURING DECEL - 2.3L OHC TURBO
^ HESITATION - DURING ACCELERATION - 2.3L OHC TURBO
^ POOR PERFORMANCE - 2.3L OHC TURBO
Article No. 88-3-11
FORD: 1983-84 MUSTANG 1983-87 THUNDERBIRD
LINCOLN-MERCURY: 1983-84 CAPRI 1983-86 COUGAR
ISSUE: Oil consumption, detonation, rough idle, stalling on decel and poor performance may be caused by oil entering the vane meter and throttle body through the air inlet tube that connects the turbocharger and the vane meter air outlet. This may be caused by one or more of the following:
^ High engine oil level causing oil foaming.
^ Excessive crankcase pressure caused by an interrupted PCV (Positive Crankcase Ventilation) flow.
^ Incorrect location of the speed control system vacuum hose nipple at the PCV closure tube (TSB 86-10-8).
^ Restriction in the vent tube connector (TSB 84-16-23).
^ Ineffective oil separator (TSB 84-6-18).
ACTION: To correct this, use the following service procedures to keep oil from collecting in the service ribs of the air inlet tube and entering the vane meter and throttle body. Clean the air vane meter to remove any oil residue.
1983-84 Model Year Vehicles
1. Check to see if rocker arm cover has a rear external oil separator. If not, then install oil separator E5SZ-6A785-A. Refer to TSB 84-6-18.
2. Check to see if vent tube connector on turbocharger inlet elbow is correct size. Refer to TSB 84-16-23.
3. If vehicle is equipped with speed control, a new turbocharger air inlet elbow (E6SZ-9C674-A) must be installed before going to Step 4 of this procedure. Refer to TSB 86-10-8.
4. If the above corrections do not correct oil accumulation in the ribs of the air inlet tube, add the following parts.
^ Rocker Arm Cover - E7SZ-6582-A
^ Grommet - E7AZ-6A892-A
^ Screw-in Oil Fill Cap - E7DZ-6766-A
NOTE: Clean the vane air flow meter after all of the above corrections have been made. Refer to the vane air meter cleaning procedure on page 29 of this TSB.
1985-86 Model Year Vehicles
1. If vehicle is equipped with speed control, a new turbocharger air inlet elbow (E6SZ-9C674-A) must be installed. Refer to TSB 86-10-8.
2. Check crankcase to see that oil fill is not over five (5) quarts (4 quarts plus 1 quart for filter change). If it is overfilled, then the "Max Fill" mark and wording on oil dipstick is probably incorrect. Overfilling the crankcase will cause oil to be ingested into the air intake system. Correct this by draining engine oil and throw away the old oil filter. Refill with exactly four (4) quarts plus one (1) quart for filter change. Install the new recalibrated dipstick (E7SZ- 6750-B). Refer to TSB 86-10-8.
3. If the above corrections do not correct oil accumulation in the ribs of the air inlet tube, the following parts should be added.
^ Rocker Arm Cover - E7SZ-6582-A
^ Grommet - E7AZ-6A892-A
^ Oil Separator - E6ZZ-6A785-A
^ Screw-in Oil Fill Cap - E7DZ-6766-A
NOTE: Clean the vane air flow meter after all of the above corrections have been made. Refer to the vane air meter cleaning procedure on this page.
1987 Model Year Vehicles (Early)
1. Check to see that oil fill in crankcase is not over five (5) quarts (4 quarts plus 1 quart for filter change). If it is overfilled, then the "Max Fill" mark or wording on the oil dipstick is probably incorrect. Overfilling crankcase will cause oil to be ingested into air intake system. Correct by draining engine oil and throw away old oil filter. Refill with exactly four (4) quarts plus one (1) quart for filter change.
2. Install new recalibrated dipstick (E7SZ-6750-B). Refer to TSB 86-10-8.
NOTE: Clean the vane air flow meter after all of the above corrections have been made. Refer to the vane air meter cleaning procedure on this page.
Vane Air Meter Cleaning Procedure
1. Remove the vane air meter. Refer to the appropriate Car Shop Manual, Volume D, for the removal and installation procedures.
2. After the vane air meter has been removed from the vehicle, spray carburetor cleaner (D9AZ- 19579-AA) on a clean cloth and pass the cloth through the meter to remove as much of the film as possible.
CAUTION: DO NOT spray the carburetor cleaner directly into the vane air meter. This may damage the electronics in the meter.
3. Reinstall the air vane meter.
PART NUMBER PART NAME CLASS
E7SZ-6582-A Rocker Arm Cover C
E7AZ-6A892-A Grommet A
E6ZZ-6A785-A Oil Separator C
E7DZ-6766-A Screw-In Oil Fill Cap B
E6SZ-9C674-A Air Inlet Elbow BM
E5SZ-6A785-A Oil Separator - 1983-84 AM
E7SZ-6750-B Dipstick C
D9AZ-19579-AA Carburetor Cleaner B
OTHER APPLICABLE ARTICLES: 86-10-8, 84-16-23, 84-6-18
WARRANTY STATUS: Eligible Under Powertrain Warranty Coverage
OPERATION: 880311A
TIME: 2.7 Hrs. - 1983-84 Vehicles 2.4 Hrs. - 1985-86 Vehicles 1.1 Hrs. - 1987 Vehicles DLR. CODING: Basic Part No. 9C674 - Code: N4