P38A 2.5 diesel crank sensor.

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Musicmaker

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Glasgow, Scotland
I disconnected the plug from the sensor and the engine still started . Is this limpmode? I cant get a proper look. What size of Allen key 5mm. Thanks.
 
I disconnected the plug from the sensor and the engine still started . Is this limpmode? I cant get a proper look. What size of Allen key 5mm. Thanks.

It is taking RPM readings from number four injector, usually revs at around 2000 rpm if it is doing that, because it only gets a signal every two revolutions. As said before DO NOT remove bracket that the sensor bolts to. ONLY remove the sensor from the bracket.
 
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Make sure you get the washer, air gap has to be just right

Air gap 1 mm is set with a special tool to set bracket in correct position. That is why i stressed NOT to remove bracket. No washer that effects sensor position that i know of. Unless someone has used a very innovative way of gaping the sensor. Bolt sensor to bracket, slide sensor and bracket in until sensor touches timing pip. Bolt bracket down then remove sensor and use a 1 mm thick washer to space sensor back from bracket. Pretty ingenious way of doing it if you don't have LRT-12-122 handy.
 
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