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[dbug]

OK so what code would be produced if the phonic wheel that the crank sensor is looking at had a damaged tooth???

Please don't say my advice is wrong.

The fault code is saying incorrect rpm, this could be produced for many reasons if you think about it a little.

Sorry not so good on these forums should be quoting dbug here.

Probably a 31, possibly a 19, dependant when the breakage occured, as the engine wouldn't start even with a good crank sensor.  However suspect that to be a very very obscure fault - normally a 19 refers to failed crank sensor (wiring usually fails not actual sensor) which is a common fault on Omegas due to the close proximity of the sensor wiring to the exhaust.  Rerouting helps it last longer!!

If the phonic wheel that the crank sensor is looking at had a damaged tooth, clearing a 19 code and waiting would not help.  As the engine would not then start, the only code showing would be 31(Engine RPM signal (crankshaft sensor) - No signal)  - normal for an engine not running.  Still think your advice unhelpful - sorry my opinion.

19 fault code is saying  "Incorrect RPM signal (crankshaft sensor)"

[CaptainZok]

I'd be guessing a normal CS output would be square wave ish with an elongated space at TDC going off the cutouts on the wheel. So wheel damage would give more long space pulses maybe.
But wouldn't you then get a similar signal with a wire on the sensor intermittently shorting out?

Nearly, you would think it would be square because the teeth are, however the teeth actually produce triangular peaks if that makes sense, correct on the missing tooth producing a gap.  If people are interested I could post an example, if I can remember my password for images  :-/

Due to it being a proximity sensor not a digital on/off?

[3.0V6]

I'd be guessing a normal CS output would be square wave ish with an elongated space at TDC going off the cutouts on the wheel. So wheel damage would give more long space pulses maybe.
But wouldn't you then get a similar signal with a wire on the sensor intermittently shorting out?

Nearly, you would think it would be square because the teeth are, however the teeth actually produce triangular peaks if that makes sense, correct on the missing tooth producing a gap.  If people are interested I could post an example, if I can remember my password for images  :-/

Due to it being a proximity sensor not a digital on/off?

Yep pretty much - most crank sensor are inductive, generating there own voltage.

[3.0V6]

OK so what code would be produced if the phonic wheel that the crank sensor is looking at had a damaged tooth???

Please don't say my advice is wrong.

The fault code is saying incorrect rpm, this could be produced for many reasons if you think about it a little.

Sorry not so good on these forums should be quoting dbug here.

Probably a 31, possibly a 19, dependant when the breakage occured, as the engine wouldn't start even with a good crank sensor.  However suspect that to be a very very obscure fault - normally a 19 refers to failed crank sensor (wiring usually fails not actual sensor) which is a common fault on Omegas due to the close proximity of the sensor wiring to the exhaust.  Rerouting helps it last longer!!

If the phonic wheel that the crank sensor is looking at had a damaged tooth, clearing a 19 code and waiting would not help.  As the engine would not then start, the only code showing would be 31(Engine RPM signal (crankshaft sensor) - No signal)  - normal for an engine not running.  Still think your advice unhelpful - sorry my opinion.

19 fault code is saying  "Incorrect RPM signal (crankshaft sensor)"

Interesting opinion, to be fair I suppose it depends on the intelligence programmed into the engine ECU.  A Renault fitted with an incorrect flywheel (two missing teeth) after a rebuild was happy to idle at 1600 rpm for example.

Anyway enough thread crashing for one evening I think 

[black beauty]

so that means they are inductive sensors as opposed to npn or pnp is that correct kack

[dad1uk]

I reckon so too Daz, got the head gaskets and manifolds done and all running lovely,  bodykit and LPG swap over still to do - will drop by soon 

Will put the kettle on then

Don't forget Daz - no sugar!

[Elite Pete]

Cough cough, let me get the duster out

[henryd]

Cough cough, let me get the duster out

Nah its only 18 months ago