Non Starting

[dearolddaddy]

My 940 TDi was running perfectly the last time I drove it. 3Days later when I went to use it again it started ran as not using all cylinders. It then cut out and refused to start. I suspected a chocked fuel filtre and replaced it. The old one was only half full. The bleed screw was loosened and engine cranked. But no visable fuel was evident. All the rubber hoses linking the injectors were changed recently. The fuel feed pipe was blown through to see if there was a blockage non evident. There is a fuse shown on the fuse list for the fuel pump but diesels are mechinical so is there a shutoff valve to restrict the flow of fuel when the ignition is turned off. The fuse, however, is ok.
All belts were renewed recently and intact. The milage is a genuine 68000 and I have regular servicing. What could cause fuel starvation when the fuel tank is over half full.
:Banane45: dearolddaddy

[jor]

Hopefully someone more mechanically gifted than myself will choose to reply Dad..eventually! In the interim here's what second hand info there is to be gained from the site.
Those who have reported similar problems include Tricksum (940 TD idle mystery) and craig8661 (running fault on bio), if you do a search for these members posts there may be something for you. Don't do what tricksum was advised to do - loosen the bleed screw and run the engine, as he ended up sucking air into the lines. The thread comes to an end after this so one doesn't know how things turned out. There is no fuel pump in the tank either, mentioned in the "bleeding advice" post.
Craig's trouble, which sounds almost exactly the same as yours, was due to the pump rear seal which cost ₤30 to fix. Presumably he took off the pump himself and brought it to be fixed, as I imagine a specialist would want at least ₤50 for this, without doing anything else.
Although I'm sure that it has nothing to do with the non start problem, this would be a good time to check whether your injectors were serviced, the nozzles are replaced every 60,000 miles and this may not have been done given your low mileage.

john

[hawaiianblue]

Ok well start with the basics.

YOu say the tank is half full, are you sure it's full? With volvo fuel gauges being as bad as they are, have you manually check the tank?

If it has fuel next step would be to loosen the fuel pipes on the injectors and crank it, see if fuel leaks out of each.

If that's ok, retighten the unions.

Is the pump timed correctly? Is the Belt slack? it may well have jumped a few teeth putting the timing out.

If the fuel filter was only half full then it may simply be an air lock, take the filter off and fill it with Diesel, also if you've blown the lines though they'll now be empty and you may need a lot of cranking to bleed the system through.

[monkeh]

Maybe worth putting a capful of white spirit into the filter, and as for checking the fuel lines, Make sure that they havent been crimped/kinked in any way.
Youll need a good battery to keep chunking the engine over to get the air out. The white spirit does help. and unfortunatly, it will probaly be a cold start, but youll have to kee the revs high while it pulls te air out. Wish there was a priming circuit on these engines. Make things a lot easier.

[jor]

Sorry to hear you've still got problems. There is an American site devoted to the d24 (email to d24-owner@lists.subtend.net if you want to join) in the archives of which is a discussion of ways to prime a pump. The no-nonsense way apparently is to rig up a can on the roof and let gravity do it. Does sound rather messy and would definitely prove to be were I to give it a go.
There is a "spare" engine which in the garage, with a pump on it so if you happen to live close to wembley you are welcome to try it!
My only other suggestion besides that of bringing either car or pump to your local friendly diesel specialist is to mail Peter Milnes, the register keeper, who is particularly knowledgeable about the d24, as he owns one and is a mechanic
My money is still on the trouble being a pump seal based on craig8661's experience.

john

[RoyMacDonald]

I just noticed you left it for 30 days and so I'm wondering if your battery is up to the mark as it takes a lot of juice to start a 940TD and everything can appear OK but it just won't start. Remember the glow plugs need a lot of juice to get things going.

[jor]

3 days not 30 Roy!

john (confuses petrol and diesel)

[RoyMacDonald]

3 days not 30 Roy!

john (confuses petrol and diesel)

Sorry....better put my other glasses on John.

[Mister T]

If this engine ran Ok up to this point and briefly at first start I suspect that the stop solonoid blew its fuse and or is sticking not allowing pressure build up in the pump.
Check to see if there is power at the solonoid with a test lamp or meter, if yes then you may have a sticking or open circuit in the solonoid.
Mister T.

[jpliddy]

hi i have had my 940 . 8 years the only time it let me down was glow plugs . the AA got me going and told me the problem so off to my dealer .6 glow plugs £99.00 fitted by myself . 5 years later to save getting caught again i got another 6 from my bosch dealer £38.00 same one
so if they have not been changed it will a job worth doing numbers 5and 6 look very difficult but i did no.6 by removing the EGR and the intercooler hose put a very large cushion on top of the engine and climbe up and try to get in a comfy postion and with long reach spanners .a lamp. a magnet on a pole incase the nuts or plug needs to be put in place as you cant get your fingers down to the plug hole. hope you get sorted
regards james liddy

[jor]

I don't think it'll turn out to be glow plugs - the engine started and ran as if not firing on all cylinders. When the glow plugs go it just takes progressively longer to get the thing started, but once it is it will keep going. So winter is generally the time a problem will appear, if poor plug condition is the problem. Sounds more like a fuel supply issue.
Never knew about the fuel solenoid tho' so it may be worthwhile asking Mr. T. for details as to how to check it.
Agreed this may be an appropriate opportunity to renew plugs and have injectors serviced.

john