Idle Speed - Erratic Idle/Deceleration Stalls
84ford13Article No. 84-14-14
IDLE - ERRATIC/DECEL STALLS 2.3L EFI
FORD 1983-1/2 T-BIRD
CALIBRATIONS: 3-05E-R10
The above concerns may occur if the base idle is not set to specification. The procedure (shown on the following page) must be used to set base idle to specification.
NOTE: Before setting base idle, check to see if throttle plate screw has a spring in place to prevent it from vibrating loose. If not, discard existing screw and install screw 355107-57 and spring B8A-9578-B which is listed in TSB 83-14-12.
OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: "INFORMATION ONLY"
Figure 1 - 2.3L Turbo w/Electronic Fuel Injection:
Idle Speed Setting Procedures
NOTE: Curb idle speed (RPM) is controlled by the EEC-IV processor and the idle speed control air bypass valve assembly (Fig. 1). If engine curb idle rpm is not within specification after performing this procedure, it will be necessary to perform the appropriate 2.3L EFI Turbo EECIV diagnostics.
1. Place the transmission in neutral, turn the A/C-Heat selector to the Off position.
2. Bring the engine to normal operating temperature and turn Off.
3. Disconnect the idle speed control air bypass valve power lead.
4. Start engine and operate at 2,000 rpm for 120 seconds.
5. If electric cooling fan comes on during idle speed set procedure disconnect power lead and proceed.
6. Let engine idle and check base idle rpm (750 +/- 50 rpm).
7. Adjust engine rpm to specification by adjusting throttle plate stop screw (Fig. 1).
8. Shut engine off and reconnect.
^ Power lead to idle speed control air bypass valve.
^ Electric cooling fan.
9. Verify throttle plate is not stuck in the bore by exercising throttle plate.
NOTE: If excessive engine idle speeds are experienced when driving the vehicle on the idle system, turn to the ignition switch to Off position and restart.