Engine does not turn off!

q_007 · Unread post by **q_007** » 21 Jul 2005, 04:21

Hi
I have a Citroen Xantia where the engine does not turn off on the key! Car is an L reg 1.9D hatchback
I have to stall the car to turn it off (not good for my clutch/gearbox i think!!)
How can i resolve this?
Thanks
Q

wilkobob · Unread post by **wilkobob** » 21 Jul 2005, 04:54

Check that the stop solenoid on the diesel pump is working (any loose connections?) If not, its probably going to need replacing.

Unread post by **Peter.N.** » 21 Jul 2005, 14:12

Check for 12 volts on the solonoid terminal, should dissapear when turned off, if it does, as wilkobob said, change the solonoid.

vanny · Unread post by **vanny** » 21 Jul 2005, 14:39

and get it done sooner rather than later! I know of a couple of cases like this where the owner has left the problem for considerable amount of time, and when taken to the garage they simply couldn't get the engine to stop and in one case melted the engine (god knows to what extent though!).
Stop solenoids are reasonalby easy to change and non too expensive so probably worth having a crack at yourself! If you dont know what the stop solenoid is then consult the Haynes Diesel Engine manual!

q_007 · Unread post by **q_007** » 21 Jul 2005, 17:42

Thanks guys!
Could i put in a manual push to break switch temporarily?
Also, anyone got a pick or instructions on how to sort it?
Q

sooty · Unread post by **sooty** » 21 Jul 2005, 17:50

The problem may be internal where the seal that shuts the fuel off, has cracked/split. So even if there is no 12v supply at the soleniod
the engine will keep running because the fuel is leaking past the seal.
The only remedy is to change the soleniod as others have said.

bxbodger · Unread post by **bxbodger** » 21 Jul 2005, 17:56

Its fairly obvious how to change it- its on top of the diesel pump with a wire going to it, have a look in the Haynes book if uncertain.
Have a look here-this is Bosch but rotodiesel is similarhttp://www.cs.rochester.edu/u/jag/vw/en ... jpump.htmlIts what they refer to on there as the "magnet valve"
They just screw out and the replacement screws in.

davek-uk · Unread post by **davek-uk** » 21 Jul 2005, 18:09

Does the stop solenoid often get stuck open? I would have thought the usual fail state would be unenergised and closed. I've only had to replace one that sprung a leak.
It's simple to check, ensure the 12v supply to the top of the solenoid disapears when the ignition is turned off. If it does then the solenoid must be stuck open.

Kowalski · Unread post by **Kowalski** » 21 Jul 2005, 21:25

The Lucas ones typically give trouble, the rubber bit on the end of them swells and sticks. The Bosch solenoids are typcially more reliable.

wrinklet1 · Unread post by **wrinklet1** » 23 Jul 2005, 13:12

If you still have the problem, look in the owners maual and you will see that there is a manual stop lever on your fuel pump, normally a brass-ish colour. Just use this to stop the car, it causes no damage and is safe. Its there if the solenoid packs in.
Paul

johnlyn · Unread post by **johnlyn** » 24 Jul 2005, 01:08

Is the solenoid located on the N/S corner of the bulkhead, if so i have got one spare.
John

Kowalski · Unread post by **Kowalski** » 24 Jul 2005, 01:42

If you've got a Lucas fuel pump on your engine (more likely than the Bosch) it's on top of the fuel pump, a round object with a wire coming off it.