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[henryd]

The signal the crank sensor see's is weakest during cranking (as the engine turns over at less than idel speed).

It is a type of sensor that can give a porrer signal when hot.

So cranking plus a failing sensor equals a very weak signal. 

But again, check the CTS resistances as a starting point.

Will do 

Steve,what age car and which engine size,should be able to give you the ohms readings for the CTS at various temps

1998 1.1 henry 

Cts check at sensor

10 degrees C  3530-4100 ohms
20                2350-2670
30                1585-1790
40                1085-1230
50                  763-857
60                  540-615
80                  292-326
90                  215-245

hope that helps

[Marks DTM Calib]

Pretty standard sensor range then 

[omega3000]

  I cant find which is the correct sensor , the nearest to the stat housing is a green connection and next to it on the block is another but blue connection .
Scoured the net and some are saying green some saying its the blue to the ECU 

2 pin on the green

3 pin on the blue

Pug forum is useless for an answer so im stuck now as to which goes to ECU 

[Marks DTM Calib]

The Bosch setups are usualy a two pin device although some very early ones were three pin. Normaly an aqua/greeen colour and pretty sure the shitroen ones are the same

[omega3000]

The Bosch setups are usualy a two pin device although some very early ones were three pin. Normaly an aqua/greeen colour and pretty sure the shitroen ones are the same

I have a new Green one and on the box says " engine management coolant temp sensor " But the connection is different to the one on the car  Back to the drawing board .

[henryd]

The Bosch setups are usualy a two pin device although some very early ones were three pin. Normaly an aqua/greeen colour and pretty sure the shitroen ones are the same

I have a new Green one and on the box says " engine management coolant temp sensor " But the connection is different to the one on the car  Back to the drawing board .

I agree with Mark,it's normally the green one,do you know anyone with a scanner that can access the pug,be good to view live readings and look at what the ECU is seeing

[omega3000]

The Bosch setups are usualy a two pin device although some very early ones were three pin. Normaly an aqua/greeen colour and pretty sure the shitroen ones are the same

I have a new Green one and on the box says " engine management coolant temp sensor " But the connection is different to the one on the car  Back to the drawing board .

I agree with Mark,it's normally the green one,do you know anyone with a scanner that can access the pug,be good to view live readings and look at what the ECU is seeing

No henry not that i know of 

One thing that ive seen on the web is that if the green sensor is disconnected while the car is running , if the throttle rises then the sensor is working 

[omega3000]

Tick over seems high so another pointer towards CTS , ive been sent the right sensor but wrong connection    Apparently the are 16 different CTS's  Another one on its way 

[henryd]

Tick over seems high so another pointer towards CTS , ive been sent the right sensor but wrong connection    Apparently the are 16 different CTS's  Another one on its way 

Gotta love the frogs

[omega3000]

Tick over seems high so another pointer towards CTS , ive been sent the right sensor but wrong connection    Apparently the are 16 different CTS's  Another one on its way 

Gotta love the frogs

Aye  Only 14 more to try 

[omega3000]

Well new sensor is in , stopped and started 2 times when warm and it starts fine  Was well worth an hour of swearing with accompanied frost bite 

[henryd]

Well new sensor is in , stopped and started 2 times when warm and it starts fine  Was well worth an hour of swearing with accompanied frost bite 

Nice one

[aaronjb]

Well new sensor is in , stopped and started 2 times when warm and it starts fine  Was well worth an hour of swearing with accompanied frost bite 

But did you figure out what the yellow ring was for?

[omega3000]

Well new sensor is in , stopped and started 2 times when warm and it starts fine  Was well worth an hour of swearing with accompanied frost bite 

But did you figure out what the yellow ring was for?

Err no  There was a similar one on the old one so im presuming its a colour coding thingamygig 

[aaronjb]

Well new sensor is in , stopped and started 2 times when warm and it starts fine  Was well worth an hour of swearing with accompanied frost bite 

But did you figure out what the yellow ring was for?

Err no  There was a similar one on the old one so im presuming its a colour coding thingamygig 

Maybe it's just so you know which one of the 14 different coolant temp sensors you're meant to order..