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map sensor replacement
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Post map sensor replacement 
i have a mjlj and the map sensors gone faulty where can i either get a replacement or how do i go about wiring in a 3 wire 2 bar map sensor? any 1 done this?

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Hi Chris,

How do you know the MAP sensor is faulty? Just want to make sure it's not something else.

The Map sensor is a Freescale part MPX4250AP - you could probably find it at Maplins in the UK, or you can purchase the MAP sensor conversion kit from us here (Assuming V4 controller)
http://www.autosportlabs.com/mjlj-conversion-p-50.html


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Brent Picasso
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it has mas fluctuation in its readings all a sudden at think over its almost at ful vac tand flicks full to 0 all though the rev range!

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That's crazy! What happens if the map sensor vacuum line is disconnected while the engine is running?


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it says it on full vacum then if u start pullin a vacum with a suringe it flutates all over the place!

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Post Adding MPS 
I have a TPS board, can i add this part to this board to have a MAP version. I have a Spitfire Mk IV so MAP is my preferred option.




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Yes. You just need to install the MPX4250 AP with the port facing down (towards the board). Secure the MAP sensor with a small zip tie or bolts.

The port will extend through a hole that needs to be drilled in the end plate of the unit.

Hope this helps,


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