Intermittent Power Loss - Insulate O2 Wire (08-16-84)

INTERMITTENT POWER LOSS - INSULATE O2 WIRE

TECHNICAL SERVICE BULLETIN

POOR PERFORMANCE/INTERMITTENT LOSS OF POWER (SAG) FROM O2 WIRE LEAKAGE

Model(s): 1983-84 Omni/600/Horizon/Aries/Reliant/LeBaron/Charger/New Yorker/E-Class/Rampage/Turismo/400/Scamp/Laser/Daytona/Caravan/Mini Ram Van/Voyager

Group: Engine Performance/Accessories & Electrical

Bulletin No.: 08-16-84

Date: July 9, 1984

Symptom: Poor Performance/Intermittent Loss of Power (Sag) from O2 Wire Leakage

SYMPTOM/CONDITION

Vehicle may exhibit an intermittent loss of power (sag) while driving at steady speeds or exhibit intermittent poor performance accelerating off idle. The above conditions may be aggravated in damp weather. One or both of these conditions may be caused by electrical tracking at the eight-way engine harness connector. Voltage feeds may track to the O2 wire and coolant sensor (for those models equipped with coolant sensor not switch).

DIAGNOSIS

This condition is intermittent and it may be difficult to diagnose using the Driveability Test Procedure.

• Connect a voltmeter to the °2 solenoid green wire at carburetor and ground.
• Connect tachometer.
• Disconnect and plug ESA computer vacuum hose. With auxiliary vacuum supply, apply 14 inches vacuum to computer.
• Start engine and operate until engine is at full operating temperature.
• Raise engine speed to 2000 rpm.

VEHICLES EQUIPPED WITH COOLANT SENSOR ONLY

• If voltage did not drop, additional testing is required.
• Shut engine off.
• With engine not running, again thoroughly dampen the eight-way connector.
• Restart vehicle and wait 30 seconds.
• Raise engine speed to 2000 rpm.
• Note voltmeter. A steady reading indicates O2 system is in open loop. If so, proceed to repair procedure.

QTY.	DESCRIPTION	PART NUMBER
1	Male Insulator (Purple)	PN 4124686
1	Female Insulator (Purple)	PN 4124687
1	Male Insulator (Natural)	PN 4274267
1	Female Insulator (Natural)	PN 38437S4
1	Grease	PN 4318063

REPAIR PROCEDURE (O2 WIRE)

1. Disconnect battery.
2. Remove air cleaner duct.
3. Disconnect engine eight-way connector. See Fig 1 .
4. Extract N11 #18 black wire from both connector halves and reset female terminal tang. See Fig 2 . Be sure terminals are clean and bright.
5. Coat the terminals liberally with Grease, PN 4318063, and snap into Purple Insulators, PN 4124686 and PN 4124687.
6. Pack grease into terminal cavities through wire grip areas until full. Mate the single connectors.
7. Vehicles With Coolant Sensor Only 
   1. Extract N8 #18 black/red wire from both connector halves and reset female terminal tang. See Fig 3 . Be sure terminals are clean and bright.
   2. Coat liberally With Grease, PN 4318063, and snap into Natural Insulators, PN 4274267 and 3843753.
   3. Pack grease into terminal cavities through wire grip areas until full. Mate the single connectors.
8. Reconnect engine eight-way connector.
9. Reinstall air cleaner duct and reconnect battery.
10. Start engine. Recheck O2 and coolant sensor (where used) operation. Remove instruments. Unplug and reconnect vacuum hose to ESA computer.