Might even try a shielded twisted pair on the sensing leads guys and ground one end of the shield. The amount of electrical noise in today's ignitions and control systems could easily overwhelm low voltage sensing inputs. I'm actually amazed there isn't more shielding protection required in all these low voltage systems and components when it comes to interface wiring. And the frequency these computers, digital gages, and entertainment systems operate at also can cause noise or false signal interference when not grounded or shielded properly.
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