5.0/5.7/6.0L/8.1L Symptoms 7 - 1
MEFI 4 - PCM
Marine Electronic Fuel Injection (MEFI)
Section 7
Symptoms
Contents
Cuts Out, Misses................................................. Page 14
Rough, Unstable Or Incorrect Idle, Stalling......... Page 16
Poor Fuel Economy............................................. Page 19
Dieseling, Run-On............................................... Page 21
Backfi re................................................................ Page 22
ECM Connector “J1” Symptom Table.................. Page 24
ECM Connector “J2” Symptom Table.................. Page 26
Fuel Injector Coil Test ......................................... Page 28
Fuel Injector Balance Test................................... Page 30
Symptoms ............................................................. Page 2
Important Preliminary Checks...............................Page 2
Visual/Physical Check ........................................... Page 2
Intermittents........................................................... Page 2
Hard Start..............................................................Page 3
Surges And/Or Chuggles ...................................... Page 6
Lack Of Power, Sluggish Or Spongy..................... Page 8
Detonation/Spark Knock...................................... Page 10
Hesitation, Sag, Stumble..................................... Page 12
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