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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) 13A-31 . PROBLEM SYMPTOMS TABLE (FOR YOUR INFORMATION) Idling stability When the engine is cold, it stalls at idle (die out) 11 When the engine is hot, it stalls at idle (die out) 12 The engine stalls when accelerating (pass out) 13 The engine stalls when decelerating 14 Driving Hesitation, sag or stumble 15 Acceleration shock 16 Deceleration shock 17 Poor acceleration 18 Surge 19 Knocking 20 Dieseling (Run-on) 21 Too high CO and HC concentration when idling 22 IM240 test Transient, mass emission tailpipe test failure 23 Purge flow test of the evaporative emission canister 24 Pressure test of the evaporative system failure 25 Improper idle speed when the A/C is operating (A/C switch 2 signal) 26 A/C condenser fan is inoperative 27 Power supply system and ignition switch-IG system 28 Fuel pump system 29 Ignition switch-ST system and transmission range switch system 30 Ignition circuit system 31 A/C system 32 Accelerator pedal position switch system 33 TROUBLE SYMPTOMS INSPECTION REFERENCE ITEMS SYMPTOM At Starting Won't start The starter cranks the engine, but there is no combustion within the Starts up and The engine starts, but then engine soon stalls. Hard starting Engine starts after cranking a while. |