Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD1990RANGER 4WD L4-140 2.3L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTTECHNICAL SERVICE BULLETINSALL TECHNICAL SERVICE BULLETINSEEC IV - REVISED PINPOINT TEST STEPS
1990 Ford Ranger 4WD L4-140 2.3L SOHC
EEC IV - Revised Pinpoint Test Steps
1990 Ford Ranger 4WD L4-140 2.3L SOHCSECTION EEC IV - Revised Pinpoint Test Steps
89ford36
ROTUNDA EQUIPMENT - "TFI/EEC-IV INTERMITTENT IGNITION ANALYZER" INSTRUCTION BOOK - "PINPOINT TEST" FLOW CHART CORRECTION
Article No. 89-25-10
FORD: 1987-90 CROWN VICTORIA, ESCORT, MUSTANG, TAURUS, TEMPO
LINCOLN-MERCURY: 1987-90 CONTINENTAL, GRAND MARQUIS, MARK VII, SABLE, TOPAZ, TOWN CAR
LIGHT TRUCK: 1987-90 AEROSTAR, BRONCO II, BRONCO, ECONOLINE, F-150, F-250, F-350, RANGER 1988-90 F SUPER DUTY
ISSUE: The "Pinpoint Test" flow chart on page 8 in the instruction book is incorrect. The instruction book (Rotunda # 2490-786) comes with the "TFI/EEC-IV Intermittent Ignition Analyzer" Model HK453 (Rotunda Equipment # 007-00035).
ACTION: Use the revised "Pinpoint Test" steps shown in Figure 1. This information should be inserted in the instruction book, page 8, for future use.
OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: INFORMATION ONLY
OASIS CODES: 680000
ROTUNDA EQUIPMENT - "TFI/EEC-IV INTERMITTENT IGNITION ANALYZER" INSTRUCTION BOOK - "PINPOINT TEST" FLOW CHART CORRECTION
Article No. 89-25-10
FORD: 1987-90 CROWN VICTORIA, ESCORT, MUSTANG, TAURUS, TEMPO
LINCOLN-MERCURY: 1987-90 CONTINENTAL, GRAND MARQUIS, MARK VII, SABLE, TOPAZ, TOWN CAR
LIGHT TRUCK: 1987-90 AEROSTAR, BRONCO II, BRONCO, ECONOLINE, F-150, F-250, F-350, RANGER 1988-90 F SUPER DUTY
Figure 1:
ISSUE: The "Pinpoint Test" flow chart on page 8 in the instruction book is incorrect. The instruction book (Rotunda # 2490-786) comes with the "TFI/EEC-IV Intermittent Ignition Analyzer" Model HK453 (Rotunda Equipment # 007-00035).
ACTION: Use the revised "Pinpoint Test" steps shown in Figure 1. This information should be inserted in the instruction book, page 8, for future use.
OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: INFORMATION ONLY
OASIS CODES: 680000
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.