Good afternoon,
I purchased a reman 4.0 Jeep engine for my cherokee on Dec 6
I have installed the motor and it is running great. Initially I was getting 0132 code for high voltage to O2 sensor 1 bank 1. I changed both of the sensor and continued to get the code with that new sensors. I checked the wire harness from the o2 sensors up to the ECU for pinches or wire issues and did not find any. I cleaned all the grounds on the block and battery. I put the old sensor back in and began to get the 135 code for heating element for o2 sensor. I checked the fuse and it was popped. I replaced the fuse and put the new 02 sensor back in and drove with no CEL. With the new motor, I have replaced IAT, Cam Sensor, MAP, TPS, eng temp sensor, Idle control valve, spark plugs.
I have checked the intake manifold with starting fluid to verify that there are no vacuum leaks including plugging the PCV on the manifold. I went to the emission testing station today thinking I was good, to renew my registration and it failed the Carbon Monoxide test 19.7 GPM with the limit of 15.0.
I have no CEL, I have driven just over 500 miles on this motor and changed the oil today prior to the test. I pulled the spark plugs and there is no soot on them, just a very faint tan color on the insulators. I also changed the fuel injectors to the original Jeep injectors from the Ford multi hole injectors with no change on the reading on the o2 sensor.
What suggestions do you have for me to try next. I am going to replace the O2 sensor just to verify that is not the issue. The engine runs great so I am at a loss.
Thanks for your time.
Travis
I purchased a reman 4.0 Jeep engine for my cherokee on Dec 6
I have installed the motor and it is running great. Initially I was getting 0132 code for high voltage to O2 sensor 1 bank 1. I changed both of the sensor and continued to get the code with that new sensors. I checked the wire harness from the o2 sensors up to the ECU for pinches or wire issues and did not find any. I cleaned all the grounds on the block and battery. I put the old sensor back in and began to get the 135 code for heating element for o2 sensor. I checked the fuse and it was popped. I replaced the fuse and put the new 02 sensor back in and drove with no CEL. With the new motor, I have replaced IAT, Cam Sensor, MAP, TPS, eng temp sensor, Idle control valve, spark plugs.
I have checked the intake manifold with starting fluid to verify that there are no vacuum leaks including plugging the PCV on the manifold. I went to the emission testing station today thinking I was good, to renew my registration and it failed the Carbon Monoxide test 19.7 GPM with the limit of 15.0.
I have no CEL, I have driven just over 500 miles on this motor and changed the oil today prior to the test. I pulled the spark plugs and there is no soot on them, just a very faint tan color on the insulators. I also changed the fuel injectors to the original Jeep injectors from the Ford multi hole injectors with no change on the reading on the o2 sensor.
What suggestions do you have for me to try next. I am going to replace the O2 sensor just to verify that is not the issue. The engine runs great so I am at a loss.
Thanks for your time.
Travis