Engine - No Start/Slow Start In Low Ambient Temperatures

87ford16

Article No. ^ NO START - 2.9L EFI - IN LOW AMBIENT
87-17-15 TEMPERATURES


^ SLOW START - 2.9L EFI - IN LOW AMBIENT TEMPERATURES


LIGHT TRUCK: 1986 RANGER, BRONCO II

ISSUE: Slow start and/or no start conditions in low ambient temperatures of 10~F/-6~C or below may be caused by an overrich EEC IV processor calibration and an incorrect throttle plate setting.

ACTION: To correct this, reset throttle plate and install a new EEC IV processor to correct the overrich condition. Refer to the following service diagnostic procedure.

1. Check closed throttle plate setting. Throttle plate setting (TRC) should allow engine to idle at 750 RPM with ISC motor disconnected. If setting is incorrect, adjust to correct setting. Refer to the 1986 Ranger/Bronco II Shop Manual, Section 24-03.

NOTE: Before adjustments, apply Ford Threadlocker #242 (E0AZ-19554-A) to TRC screw and throttle body casting. Due to the fast curing rate (20 minutes), adjustment should be made immediately.
2. Remove existing EEC IV processor and replace with new EEC IV processor, Refer to the following application chart.

EEC IV PROCESSOR APPLICATION CHART
Existing EEC IV Processor Replace with New Level
Engineering Part Number EEC IV Processor

E6TF-12A650-EA E6PZ-12A650-AA
E6TF-12A650-PA E6PZ-12A650-CA
E6TF-12A650-FA E6PZ-12A650-BA
E6TF-12A650-LC E6PZ-12A650-EA
E6TF-12A650-CD E6PZ-12A650-DA
E6TF-12A650-MC E6PZ-12A650-FA
PART NUMBER PART NAME CLASS

E6PZ-12A650-AA EEC IV Processor B
E6PZ-12A650-BA EEC IV Processor B
E6PZ-12A650-CA EEC IV Processor B
E6PZ-12A650-DA EEC IV Processor B
E6PZ-12A650-EA EEC IV Processor B
E6PZ-12A650-FA EEC IV Processor B
E0AZ-19554-A Ford Thread locker AG

OTHER APPLICABLE ARTICLES: 87-16-19
WARRANTY STATUS: Eligible under Basic Warranty Coverage
OPERATION: SP871715A
TIME: 0.9 Hr. DLR. CODING: Basic Part No. DRIVE - Code: J3