Stop Solenoid, again?

NeilB · Apr 9, 2015

A little time ago my 300TDi refused to stop. I took the key out and was half out the door before I realised the engine was still going

A tap with a hammer and blunt punch to the stop solenoid soon solved that problem but it stuck again a week later. By that time a new solenoid had arrived so I replaced it.
A day or so ago the vehicle again refused to stop.

While being a problem easier to cope with than not starting is there any other reason for a solenoid to stick open beside a faulty solenoid?

ps. Not an electrical leak as I can remove the cable and the engine still runs.

trax · Apr 9, 2015

NeilB said:
A little time ago my 300TDi refused to stop. I took the key out and was half out the door before I realised the engine was still going
A tap with a hammer and blunt punch to the stop solenoid soon solved that problem but it stuck again a week later. By that time a new solenoid had arrived so I replaced it.
A day or so ago the vehicle again refused to stop.

While being a problem easier to cope with than not starting is there any other reason for a solenoid to stick open beside a faulty solenoid?

ps. Not an electrical leak as I can remove the cable and the engine still runs.

cheap make solenoid?

i'd just double check your turbo seals aren't blown and your oil level isn't low.
as it can runaway on its own oil.

NeilB · Apr 9, 2015

Thanks for the reply but I don't think it is the turbo seals.

The engine idles fine, just doesn't stop when you take the key out. A tap to the solenoid makes it stop and it works for a few days afterwards.
Makes me think there is some crap in the hole but don't see how it got there and why it would affect two solenoids.

Kwakerman · Apr 9, 2015

Have you been running on veg oil? That can cause issues with bits of crud in the pump and stop the plunger moving freely

NeilB · Apr 9, 2015

Ah....humm...may have been.

Recently serviced the vehicle which included fuel filter. Looks like I need to crack a joint and bleed the crap out?

Kwakerman · Apr 9, 2015

Take the plunger out and look inside the pump best you can. Any signs of metallic debris mean that the pump may have been damaged due to reduced lubrication when running on veg. Veg oil can contain water which causes corrosion in the pump, if the pump starts making metallic debris it can stop the plunger seating properly.

lynall · Apr 10, 2015

Dying solenoids normally first signs inj pump is on its way out, happened to me twice now on different engines, weirdly no swarf on solenoid guts when removed.

trax · Apr 10, 2015

when did you replace the solenoid? as above, probably wise to take it out and make sure it's not gummed up/knackered

NeilB · Apr 11, 2015

The veg oil was never more than 40% so I hope there have been no lub problems.

Will whip the solenoid out next time it sticks and see what is down the hole. At the moment it is working fine.......

Stop Solenoid, again?

NeilB

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trax

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NeilB

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Kwakerman

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NeilB

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Kwakerman

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lynall

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trax

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NeilB

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