Scope crank and cam sensors as I have had weird waveforms
As the sensor is a hall effect device, the output will quite likely be a square wave. A near 5mm air gap seems quite large to me, the stuff I've worked on it's usually been 1 or 2 mm max.
If you can wind the engine over manually, you should be able to see it switching fine on your scope John.:tea:
Hi Keith.....The gap is non adjustable as it's determined by the height of the cam cover. The sensor is retained by a screw to the cover and it sits flat unlike the ABS sensor which sits in a spring sleeve and the P38 crank sensor for example which is held by a bolt and can be shimmed to adjust the air gap. A session with the scope will show whether it's kicking out a signal....WHENI get it running
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Hall effect devices respond to a magnetic field, any old bit of metal will not do.Set the sensor up on the bench and get a cordless drill to spin a bit of metal past the front of it....and compare the good one with the old one? While your waiting for the injectors![]()
Most ABS sensors are inductive and respond to metal moving, HALL effect devices do not, they respond to a magnetic field. If you don't believe me look it up on Wikipedia.Spin a magent across it? I doubt there is a magnet on the cam shaft but i could be wrong.....Flicking a metal object across an abs sensor gets a reaction.....
That's certainly a good call, I was suprised about the airgap Irish quoted.I belive I belive....so is there a magnet on the camshaft? Is it magnetic.... maybe its fallen of or the camshaft has become de magnetised.....interesting stuff.
did you check both l/p pumps or just the one in the tank I have only done the one in the tank?????feel a fool
http://www.landyzone.co.uk/lz/f9/td4-injector-testing-251479.html
if your injectors are firing, there is not much else that will prevent it from running , providing you can get an injector/injectors out , doing this test takes very little time to carry out, you dont need to remove the cam cover , or cam sensor, and doing the test like this eliminates possible causes such as fuel pumps, cam sensor etc,
really you have been ****ing about for quite a while now, and going round in circles,
good luck