Cleaned Crankshaft sensor - Saxperience

picklesayrshire · 26th July 2009, 20:48

I had major problems with lack of power, hesitation etc, i took the sensor out and it was covered in shit so i gave it a good clean up and i think that this may have cured the problem, fingers crossed, does this sound probable or am i talkin shit, still not got my speedo n tacho n fuel gaug to work yet tho
.

BobC^m · 26th July 2009, 21:05

Hi fella,

It is possible. Sounds like you may have nailed one of your problems.

picklesayrshire · 26th July 2009, 21:21

Hope so bob hope so, i had the speed sensor out as well and it appeared to be fine, had to be quick tho cos of the oil lol, what im maybe thinkin tho is that the little gear on the sensor isnt engaging with wotever it is in the box cos wen i put it bk in im sure i kind of felt the little gear bein pushed up rather than intertwining with again wotever it is in the box, but that still wouldnt sort out the tacho n fuel gauge, was thinking earths, do u know wr the earth locations are behind the dash. cmon bob ur the man lol

BobC^m · 26th July 2009, 21:30

Hi,

That sensor you cleaned "the crankshaft sensor" is also the engine speed sensor that drives the tachometer.

There is an earth on top of the gearbox that you might check.

picklesayrshire · 26th July 2009, 21:35

Quote:

Originally Posted by BobC

Hi,

That sensor you cleaned "the crankshaft sensor" is also the engine speed sensor that drives the tachometer.

There is an earth on top of the gearbox that you might check.

Im sure the speedo (if thats the vehicle speed sensor) is located on the top rear of the box, remember we spoke bout it in another thread, also earths seem ok in the engine bay, sum1 was saying that there maybe a few earths behind the dash sumwr.

BobC^m · 26th July 2009, 21:40

The dash earth is somewhere on the passenger door pillar ('A' pillar)

BobC^m · 26th July 2009, 21:41

Yup two speed sensors:

1) engine speed sensor (rpm) is the crankshaft sensor
2) vehicle speed sendor (mph) is on the gearbox

picklesayrshire · 26th July 2009, 21:42

Quote:

Originally Posted by BobC

The dash earth is somewhere on the passenger door pillar ('A' pillar)

nice 1, need to check them out as i was in there tracing wiring etc, coulda pulled sumthing perhaps.

BobC^m · 26th July 2009, 21:44

Ok, fingers crossed...

picklesayrshire · 26th July 2009, 21:44

Quote:

Originally Posted by BobC

Yup two speed sensors:

1) engine speed sensor (rpm) is the crankshaft sensor
2) vehicle speed sendor (mph) is on the gearbox

kl the gauges still arnt working tho, and in order to get a signal reading ie testing it, the wheels have to be rotated, any ideas round about this for a 1 man job or is it impossible.

seems · 26th July 2009, 22:31

I used a drill once fastened to a speed sensor on a car and ran it whilst testing, this may be easier than spinning the wheels!! Mind you, IIRC it only worked backwards? Not sure why..

picklesayrshire · 26th July 2009, 22:42

Quote:

Originally Posted by seems

I used a drill once fastened to a speed sensor on a car and ran it whilst testing, this may be easier than spinning the wheels!! Mind you, IIRC it only worked backwards? Not sure why..

how did u manage to do that lol.

picklesayrshire · 27th July 2009, 17:46

im just looking for confirmation that cleaning the crank sensor would have sorted my problems, dnt wanna take it on a long journey incase it fooks up again.

Wizzy · 27th July 2009, 18:01

Cleaning it could of solved the problem, but the only way you will find out is to take it for a spin and see what happens.

picklesayrshire · 27th July 2009, 21:48

Quote:

Originally Posted by Wizzy

Cleaning it could of solved the problem, but the only way you will find out is to take it for a spin and see what happens.

nope still problems, gotta be a sensor, could any of the coolant sensors stop the car from starting tho, i was thinking that the car maybe a bit hot, and it was starting again after it had cooled down rather than the ecu bein reset, just a thought.

BobC^m · 27th July 2009, 22:24

Hi Pickles,

So close but no cigar...well not just yet

Ok a few things. I would change that crankshaft sensor. This is a real pain on Clios and causes these symptoms, try and get one cheap from a breakers.

Also, the coolant temperature sensor (green connector) could be causing starting problems when hot. If you can use a multimeter, check the resistance of the sensor it should be around 5K ohms when cold and 100 Ohms when hot. If it reads 5K or more all the time then the ecu will make the mixture richer, a bit like a choke on a carburettor.

Could also be the air temp sensor in the throttle body, it works like the coolant temp sensor, resistance comes down as temp goes up.

Lastly, could be the oxygen sensor.

BobC^m · 27th July 2009, 22:36

Air temp Sensor - have a look in the third picture here: http://www.saxperience.com/forum/sho...d.php?t=174710

That's the throttle body, idle control valve top right, throttle position sensor middle right and air temp sensor bottom middle. The airbox has been removed.

Ok, its not a VTS but I think yours will be in a similar place.

picklesayrshire · 27th July 2009, 23:07

will give these a check in the morning, had to abandon it at a m8s. thanks again bob

picklesayrshire · 27th July 2009, 23:31

Quote:

Originally Posted by BobC

Hi Pickles,

So close but no cigar...well not just yet

Ok a few things. I would change that crankshaft sensor. This is a real pain on Clios and causes these symptoms, try and get one cheap from a breakers.

Also, the coolant temperature sensor (green connector) could be causing starting problems when hot. If you can use a multimeter, check the resistance of the sensor it should be around 5K ohms when cold and 100 Ohms when hot. If it reads 5K or more all the time then the ecu will make the mixture richer, a bit like a choke on a carburettor.

Could also be the air temp sensor in the throttle body, it works like the coolant temp sensor, resistance comes down as temp goes up.

Lastly, could be the oxygen sensor.

just to note ive tried to start the car with the coolant sensor unplugged but did nothing, reckom i should just change all the sensors and maybe get a new wiring loom.

Stevo123 · 27th July 2009, 23:43

Plug your green sensor back in, start car and run for 5 mins, unplug the sensor - if engine revs go up and it starts running bad then the sensor is working. If no change is observed the sensor is deaded (hence no change), get them for less than a tenner mate.