P1391

Tests 1084 - 1087:

Tests 1088 - 1091:

Tests 1092 - 1095:

Tests 1096 - 1097:

Tests 1098 - 1103:

Tests 1104 - 1109:

Test 1110:

SYMPTOM
P-1391 INTERMITTENT LOSS OF CMP OR CKP

WHEN MONITORED
Engine running or cranking.

SET CONDITION
When the failure counter reaches 96 for 2 consecutive trips.

POSSIBLE CAUSES
- Ckp improperly installed
- Ckp sensor connector terminal(s) observable def
- Ckp sensor signal ckt wir harness intermittent def
- Cmp sensor connector terminal(s) observably def
- Cmp sensor signal ckt wiring harness inter def
- Distributor position not in range
- Ckp defective (crankshaft)
- Crankshaft notches damaged or misaligned
- PCM connector terminal(s) obser def (ckp sensor)
- PCM connector terminal(s) obser def (cmp sensor)