Mspnp2 options port question j3

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Question regarding this port. Inside there is a j3 port it says signal ground, sensor ground, and chasis ground. There is a jumper located across the signal ground and sensor ground. The chasis ground is blank. Now if i wire a iat into the back of the options port( pin 20 as the signal) and use pin 22 as the signal return for the iat. Do i need to remove anything in the j3 port so i can use pin 22 for the signal return? I also have a maf return wired to this pin22 as well
 
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a91what

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Apr 6, 2011
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what ecu are you using? dont mess with the jumpers inside the unit. Use the [sensor ground] on the options port to wire all the sensor grounds