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Wiring Earths on MX5 PNP


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I am adding in a few wires for my Coil on plug, VVT and Crank(Hall effect) and Cam sensors.

Im just wondering what grounds can I use on the ECU? The expansion connector has sensor ground and the sensor voltage supply which I will use for the Crank and cam sensors but I am wondering if that is too many sensors if I had them all on one ground. I couldnt see an extra ground in the Link PNP ECUs pin out in the instructions.


Also how is best to shield the crank and cam sensor? I havent been able to find any slip on shielding but have found foil tape? 

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The sensors and shield can all be grounded to one sensor ground on the expansion harness.  The coils will need a high current power ground so they should be grounded direct to the cylinder head or block.

For the trigger you would be better to buy proper shielded wire - I wouldnt trust just sleeving or foil over two/three regular wires.  It shouldnt be difficult to find.

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On 4/29/2018 at 11:05 PM, Euen Burke said:

Furai,  if you still have my number give me a call. I may be able to help.

Hey Euen, Long time! Sorry Ive changed phone since then and dont have your number.


I have bought some 3 core shielded cable but Im guessing I will have to solder the wires together from the Cam and Crank sensors as theres only one sensor ground I can use 

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