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Old May 1, 2015 | 12:08 PM
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depriest95
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o2 sensor

is there possibly a way to turn off the back o2 sensors on a 99 ford f150 5.4L
 
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Old May 1, 2015 | 12:19 PM
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David7.3
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It's possible to do anything but then you will get cat efficiency codes. The rear O2s dont effect drivability but it lets the computer know when the cats are not doing what they should be doing. You didn't here this from me! Disconnect the rear O2s plug the holes in the pipes, dip the original O2s in plastic electric tape (liquid) let harden, plug them back in and zip tie them to the frame.
 
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Old May 1, 2015 | 01:07 PM
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cats

is it bad that the cats on my truck have a trikleing sound when truck is off after being running for a while
 
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Old May 1, 2015 | 01:10 PM
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No there just cooling off, nothing to worry about
 
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