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Thats not realy enough info to help you. Is it a Chevy, Ford, or what. If Chevy, then why 5.3. Did you do an engine swap. Here is how o2...
Joey Jolly posted a new thread.
Where do I put the o2 sensors gonna cut and dump out the fender 5.3, 96 mm turbo.. 94 obs
15.6 mpg on this last tank of gas.
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