Symptom Checks

Perform the following:

• Perform KOEO Self-Test. See step 14) of DIAGNOSTIC SUB-ROUTINES.
• If continuous memory Diagnostic Trouble Code (11/111-10-11/111) was NOT displayed during Key On Engine Off (KOEO) Self-Test, perform appropriate CIRCUIT TEST in appropriate TESTS W/CODES article in the ENGINE PERFORMANCE section.
• Check ignition system. On models with Distributor Ignition (DI), perform CIRCUIT TEST AA. On Ranger 2.3L engine, perform CIRCUIT TEST AB. On all other models, perform CIRCUIT TEST AC. See appropriate TESTS W/CODES article in the ENGINE PERFORMANCE section.
• Check for restricted exhaust system.
• Check engine mechanical condition. Check compression, camshaft, valve train components, etc.