Did you see my posting of yesterday about difficult starting of Isuzu diesel engines? The symptoms were very similar to yours and the cause was closed-up valve clearances. Worth thinking about if you find that glow-plugs are not the cause.
Starting a diesel engine from cold needs very high gas compression to bring the fuel/air up to auto-ignition temperature because the cylinders are cold and so is the air entering them. Any air leakage past the valves or slight reduction in starter motor speed is likely to cause difficult cold starting. These things are far more important with diesel engines than with petrol.
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Cheers for that Dizzy Thats worth thinking about!! I think its going to be a trip down the garage and not a self diagnosis on my behalf, I still can't help thinking that the other cable on the pump has something to do with cold starting, if I pull the lever that the cable is attached to the revs pick up!! Anyone got any ideas?
And I don't suppose in this model there is a interior fuse compartment? I know their is one under the bonnet by the battery but by the Manual their look like there should be one in the glove compartment, but their certainly isn't one in mine...
Tony
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the fuse box is located underneath the glove box. not actually in it. It can be opened using a pull switch, which is located next to it.
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Cheers steve. I managed to located it after taking your advice after pulling out the glove box and everything seems ok in there..
I'm still trying to work out what the other cable is on the pump, What ever it is it doesn't work even if the car is placed in reverse with the engine running, I tried disconecting the the multiplug which connects to it under the battery tray and put a tester through it and there is definately life running through to it, but what ever it is which seems like a selenoid it doesn't work...
Tony
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You could be right about the second cable having something to do with cold starting. Some truck diesels that I was involved with had a separate cold-start (fuel enrichment) device on the fuel pump.
I don't know much about specific car diesels but there must be someone here who knows what the second cable is for on a Mondeo diesel, and what it should do.
By the way, the cold-start problem that I mentioned on Isuzu diesels is caused by valve seat sinkage into the aluminium 4-valve head, not the usual valve-into-seat sinkage. Different engine to your Mondeo of course, so I don't suppose for a minute that you are suffering the same problem.
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Thanks for that Dizzy.
I'm still trying to work out what the second cable is on the pump, I'm sure its not for picking up the revs when the car is placed in reverse, it seems more like something to do with cold start like you said..
I disconected the multiplug which is the feed to the other cable, and it only shows a live supply only when the engine is running..
Tony
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My 309 Diesel has a cable (similar to yours?) on a lucas/CAV pump which speeds up the revs for a cold start. Mine is attached to a seperate thermostat in the thermostat housing. If yours is a similar set up i would suggest it is the same.
Tom
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The solenoid attached to the pump should be the fuel cut-off.
If that is duff then you wouldn't get the engine to run at all.
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