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2011-2014 Mustangs
2011-2014 Mustang Talk
Zex nmu
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<blockquote data-quote="S197OnSpray" data-source="post: 13418481" data-attributes="member: 129149"><p>The Zex unit cannot read the falling voltage wire correctly or consistently. The resistor is there to keep the check engine light off. The Zex nmu can read the rising voltage fine but you'll be activating at about half throttle. Check to make sure the resistor hasn't broken, very common from them. Zex makes half ass junk, you would be better off buying an NOS programmable switch and using it to fire off the solenoids. You do not need any lines hooked up to test the system, the Zex nmu will light up different colors in different sequences depending on if it is armed or activated. The manual should tell you which to look for. I can help you set up a different brand tps switch if you go that route. If you stay with the Zex unit, you're in for a lot of headaches down the road, sometimes they work and sometimes they are just finicky.</p><p></p><p>Good luck</p></blockquote><p></p>
[QUOTE="S197OnSpray, post: 13418481, member: 129149"] The Zex unit cannot read the falling voltage wire correctly or consistently. The resistor is there to keep the check engine light off. The Zex nmu can read the rising voltage fine but you'll be activating at about half throttle. Check to make sure the resistor hasn't broken, very common from them. Zex makes half ass junk, you would be better off buying an NOS programmable switch and using it to fire off the solenoids. You do not need any lines hooked up to test the system, the Zex nmu will light up different colors in different sequences depending on if it is armed or activated. The manual should tell you which to look for. I can help you set up a different brand tps switch if you go that route. If you stay with the Zex unit, you're in for a lot of headaches down the road, sometimes they work and sometimes they are just finicky. Good luck [/QUOTE]
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