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[Craig_R]

Right i have the EML back on after the car warmed up so i decided to follow what Kevin said try and its left me alittle lost from me thinking my problem ws the crank sensor.

The Boy said the 4 pots will run with one of the sensors knacked Cam or crank but not with both knacked

So I unpluged the crank sensor and tried to start her up but no joy just cranked plugged back in the crank sensor and unplugged the Cam sensor and started her up no problem. So with this in Mind i am now thinking its the cam sensor at the top which is duff.

Anyone ? I was 90% sure it was the crank sensor as the EML came on and fault returned when engine was warmed up but now I am thinking its the Cam Sensor. Oh how i love my car at Christmas  

[cem_devecioglu]

even a foobar crank sensor send some signal if not detached or cable broken..You cant test the crank sensor on or off!

[cem_devecioglu]

problem is crank sensor have layers inside ..when become hot these layers dont work properly ..

edit : this is valid for old sensors..info is taken from a vx/opel mechanic..

[Grumpy]

I would go for the Crank Sensor, initially. Your symptoms are similar
to the ones I had when my Crank Sensor was failing. Even a failing
sensor will work part of the time and send a signal to the ECU.

You may have more than one fault, but you won't know until you start
to eliminate them, and I would lay money that you have a failing Crank
Sensor. So do that first.
On mine I had the following simultaneous faults:
1)Failing Crank Sensor.
2)Blocked Breather Jet.
3)Oiling up IACV.
4)Intermittent  internal short on the battery.
5)Low fuel pressure from a corroded fuel pressure pipe.

And that little lot was on a 1 owner 40,000 mile car with a full Vauxhall
Main Dealer Service History.

Some one remind me what use these stamped up service books are??  

Get the Crank Sensor changed, eliminate that fault,  and see where you're at.
That might be the only fault you have, but you won't know until you clear it.

[Craig_R]

Thanks Chaps

Oh the joys of knacked cars over the Xmas period  

[Big_Mart]

What you need to do is have the car running (if poss) and THEN disconnect the crank sensor and see if the fault changes if it don`t thats your fault if it does its cam sensor.
When a cam sensor fails it usually causes rough running and stalling at low rpm it shouldn`t affect the starting.

[Kevin Wood]

I'd give it a run, wait until the fault occurs and it goes into limp-home, then unplug the sensors with it still running. The faulty sensor only seems to be giving up the ghost when it's hot.

Kevin

[ELITE-3.0-V6]

CRANK - CRANK - CRANK - SENSOR - SENSOR -SENSOR  

[JamesV6CDX]

Sod it, they are pennies - change 'em both as a pair!

[Kevin Wood]

Sod it, they are pennies - change 'em both as a pair!

As we started out with a fault code for each, I'm inclined to agree, since both of them may have misbehaved at some point.

Kevin

[Grumpy]

I also agree to change both, but the poster said on another thread that
he was tight for money, being Xmas time, and that he was going to have
to pay the full price at a Vauxhall dealer for the parts due to time constraints.
Therefore just wanted to plump for one of them.

That's why I suggest change the Crank Sensor first. The Crank Sensor will cause
stalling and be deuced difficult to start if it fails completely.

The Cam Sensor, as far as I'm aware, will rev limit and give a blanket firing
of the injectors rather than sequential firing, but will not stop starting or cause
stalling.

I stand to be corrected on this by those more knowledgeable.

[Taxi_Driver]

I agree with Craig with the test hes done..........it looks like the cam sensor.

Unplugging the crank sensor.....and it failing to start means it now has two sensors that arent working hence why it failed to start.

Unplugging the cam sensor and it still started so unpugging a duff sensor made no difference

Its the cam sensor i reckon  

[Taxi_Driver]

I also agree to change both, but the poster said on another thread that
he was tight for money, being Xmas time, and that he was going to have
to pay the full price at a Vauxhall dealer for the parts due to time constraints.
Therefore just wanted to plump for one of them.

That's why I suggest change the Crank Sensor first. The Crank Sensor will cause
stalling and be deuced difficult to start if it fails completely.

The Cam Sensor, as far as I'm aware, will rev limit and give a blanket firing
of the injectors rather than sequential firing, but will not stop starting or cause
stalling.

I stand to be corrected on this by those more knowledgeable.

On a V6 I agree........I have shown to TB that a 4pot will start with the crank sensor disconnected.....he checked with his Tech2......and my ECU was complaining of a duff crank sensor.

A duff cam sensor on a 4pot will still cause starting problems.....it takes between 5-10secs of cranking before it will fire up

[ELITE-3.0-V6]

CRANK - CRANK - CRANK - SENSOR - SENSOR -SENSOR  

im telling u it is

[Craig_R]

I just found these two on the dark side and apart from my car cut out like fliking a switch this guys did the same as mine

http://www.cavweb-forums.co.uk/showthread.php?t=97326&highlight=0340
http://www.cavweb-forums.co.uk/showthread.php?t=96154&highlight=0340

I am going to go for the Cam shaft sensor, if it does not repair the problem i will go and change the crank sensor