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Post by fugglestone on Sept 28, 2007 19:36:04 GMT
evening all.
i've got a 1994 reg. 205 trio diesel 1796cc that i got last january & now that the frost mornings have started the "water in diesel" light comes on until i've done a few miles then goes out.
the car runs fine but i didn't have this problem last winter.
could it be a faulty sensor or bad earth, that improves as the under bonnet temperature builds up?
finally where would i find the sensor?.
thanks.
fuggs.
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Post by frank on Sept 28, 2007 21:43:30 GMT
the sensor is in the bottom of the filter housing, have you changed the filter?
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Post by fugglestone on Sept 29, 2007 5:59:39 GMT
hello Frank.
the filter was changed last february, since then i've done about 2000 miles.
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Post by Donaldiesel on Oct 1, 2007 19:33:04 GMT
As the light says, you have probably got water in the fuel which collects in the bottom of the filter housing. The sensor has a float which raises with the water level and operates the switch. There is a valve under the housing for draining off the water. Do this at least once a year or more often if the light comes on. Since you do a low mileage, condensation in a rarely filled fuel tank could be causing the problem. Get this checked before the tank rusts through. Yes, it is possible that the sensor is faulty, but I would check for water first.
Regards,
Donaldiesel
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Post by fugglestone on Oct 2, 2007 6:16:37 GMT
thanks donaldiesel.
i shall give that a go.
is it just a matter of opening the drain plug & letting it run into a container.
then reprimming with the ignition on?
thanks for the help everyone.
fuggs.
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Post by fugglestone on Oct 2, 2007 7:28:11 GMT
back again.
i opened the drain plug & nothing has come out.
could this be a blockage?
regards.
fuggs.
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Post by Donaldiesel on Oct 2, 2007 13:56:08 GMT
Yes. That happens if it is not opened regularly. You could prod the hole, but if it's that bad I suggest you clean the muck out of the filter housing and fit a new filter and seals. Messy job. It is easier if you unbolt the housing from its bracket. You will need a container to catch the diesel that comes out. You can test the warning light function while you're at it by lifting the water float inside.
Regards,
Donaldiesel
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Post by fugglestone on Oct 3, 2007 19:22:38 GMT
Thanks Donaldiesel,I shall get a new filter & seals give that a go @ the weekend.
Regards.
fuggs.
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Post by fugglestone on Oct 7, 2007 11:09:47 GMT
well i changed the filter & it's still doing the same thing.
i did get the diesel to drain by squeezing the primer first.
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Post by Donaldiesel on Oct 8, 2007 12:41:59 GMT
Did you clean out the filter housing and check that the warning light sensor float moves freely?
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Post by fugglestone on Oct 8, 2007 20:00:23 GMT
Hi donaldiesel ( thanks for your patience). I cleaned out out the filter housing but couldn't see a float.
At the bottom of the housing there is a round white disk with 2 holes in that goes to the outside of the housing where it's joined to a white knob.
I looked in a Haynes manual that goes upto 1994 but it wasn't a great help,so i've ordered another manual that goes from 1994 onwards.
Besrt regards.
Fuggs
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Post by Donaldiesel on Oct 10, 2007 3:28:13 GMT
Hi Fuggs,
Is your filter housing a Bosch or a Lucas? (You would have been asked this when you got the filter). The water sensors are different. (I did assume yours was Bosch, which has a white plastic float inside the housing. Lucas sensor screws into the side of the housing and detects electrical resistance changes between water and diesel).
After you changed the filter and cleaned the housing, did the water warning light come on as soon as you started the engine, or did it take a few minutes? There has to be a certain level of water in the filter housing to trigger the light.
I must say that water in fuel seems unlikely now that you have done this work, especially since the warning light goes out after a few miles. It would normally take many miles to accumulate enough water to trigger the light. I suggest you test the warning light circuit and sensor. Unplug the sensor and start the engine. What happens to the warning light? If it still comes on, then the problem is with the warning light circuit. If the light stays out then the problem is a faulty sensor (or more water in the fuel).
Regards,
Donaldiesel
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Post by fugglestone on Oct 11, 2007 8:38:46 GMT
Morning Donaldiesel.
I turned the ignition on and the light came on, so switched off & disconnected the plug. Started the engine & the light stayed out.
Reconnected the plug & the light was back again.
When i went to get the filter the guy said i could be one of 3 so he had a look & measured the height of the housing, then gave me one to fit. he didn't say which make i had & i didn't think to ask.
After changing the filter. The light didn't come on, so i thought problem solved & switched off.
Next morning back to normal, the light came on.
I shall have a go at draining & reprimming again @ the weekend.
Best regards.
Fugg.
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Post by fugglestone on Oct 13, 2007 18:25:59 GMT
the saga continues.
drained the housing again this afternoon .
once again it wouldn't flow, so i had to use the reprimming bulb to pump it through.
i took 2x 100 gm. jars out .
no water light upon restarting, so ran it for 6 miles & still no water light.
early start tomorrow, bet it's back again.
have a good weekend.
neil.
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Post by fugglestone on Oct 15, 2007 8:29:18 GMT
Sunday morning the light was on again.
It went out again after a few miles again as usual, then every so often it would flash then go out again.
Is it possible to replace the sensor & if so where could i get one,
or is it a garage job?
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