July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Spark Check

Check the EI (high data rate) system (formerly Electronic Distributorless Ignition System - EDIS) for fault codes and repair if necessary. See QUICK TEST in appropriate article listed below. If no fault codes are present, check ignition system wiring harness connectors for corrosion and tight fit. See Fig 1, Fig 2, Fig 3 or Fig 4. Clean or repair connectors as necessary.
- TESTS W/CODES - EEC 2.5L (for Probe)
- TESTS W/CODES - EEC-IV (3.8L) (for Continental, Cougar, Mustang, Sable, Taurus & Thunderbird)
- TESTS W/CODES - EEC-IV (3.2L SHO) (for Taurus)
- TESTS W/CODES - EEC-IV (3.0L) (for Sable, Taurus, Tempo & Topaz)
- TESTS W/CODES - EEC-V (3.8L) (for Mustang)
If wiring and connectors are okay, use Neon Bulb Spark Tester (D89P-6666-A) to check for spark at each spark plug wire while cranking engine. If spark is strong and consistent at each spark plug (one spark per crankshaft revolution), ignition system is okay. If spark is not present, go to IGNITION SYSTEMS in appropriate SYSTEM/COMPONENT TESTS article listed below.
- SYSTEM/COMPONENT TESTS - EEC (2.5L) (for Probe 2.5L)
- SYSTEM/COMPONENT TESTS - EEC-IV (3.0L) (for Sable, Taurus, Tempo & Topaz)
- SYSTEM/COMPONENT TESTS - EEC-IV (3.2L SHO) (for Taurus)
- SYSTEM/COMPONENT TESTS - EEC-IV (3.8L) (for Continental, Cougar, Sable, Taurus & Thunderbird)
- SYSTEM/COMPONENT TESTS - EEC-V (for Mustang)

Fig 1: EI Sys. (High Data Rate) Elec. Diag. (3.8L Calif. & 3.0L Flex. Fuel)

G93C39489

Courtesy of FORD MOTOR CO.

Fig 2: EI System (High Data Rate) Elec. Diagram (Mustang - 3.8L)

G94G31811

Courtesy of FORD MOTOR CO.

Fig 3: EI Sys, (High Data Rate) Elec. Diag. (Cougar, Thunderbird - 4.6L)

G94H31812

Courtesy of FORD MOTOR CO.

Fig 4: EI System (High Data Rate) Elec. Diagram (4.6L, Except Cougar & Thunderbird)

G93F39490

Courtesy of FORD MOTOR CO.