The Radio Shacks here are nothing more than phone stores anymore. Local truck stop. Don't forget the short cable. EASY to do. Things to remember when doing a Firestik, replace the end before each test, it does make a difference. Also close all the doors, hoods and tailgate, make it just like you are driving. Took me awhile to remember that and I was chasing my tail for awhile wondering why the readings were never consistent.
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