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1999 Jeep Grand Cherokee Laredo 4.0L Misfire
Posted to Chrysler Driveability on 1/7/2014 15 Replies

Just replaced Engine with know good running engine, (removed by me) from a donor vehicle. 110k on used engine. started up great, ran great and quiet. could rev up engine without issue. problem is after running for 5-10 minutes it idles great, smooth and quiet....

15 Replies Received (View Replies)

  Related Documents & Media  1999 Jeep Grand Cherokee Laredo

 
Message Closed w/FIX

car Vehicle Data

1999 Jeep Grand Cherokee Laredo

VIN 1J4GW58S6X
Engine4.0 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / FUEL INJECTED
EmissionsOBD-II Compliant
SymptomsMisfire
OccursHot

Trouble Codes

P0131Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage
Message Closed w/FIX

car Vehicle Data

1999 Jeep Grand Cherokee Laredo

VIN 1J4GW58S6X
Engine4.0 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / FUEL INJECTED
EmissionsOBD-II Compliant
SymptomsMisfire
OccursHot

Trouble Codes

P0131Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage