I had the same issue. I could not jumpstart the battery for my wife 2003 Jag(I don't know why, even the mechanic could'nt). I had to buy a new one, then it worked fine. Also, check and make sure you have distilled water still inside of the battery.
I have the same problem: my wife's 2001 Jaguar S-Type would not start, jump start, or even after the battery was recharged and checked good, still did not start. I had the problem before, but I thought that the last visit at the mechanic when he changed the head gaskets, we took care of it... but I was wrong. It is an oil leak that fills up the spark plugs cavity, and the electric discharge energy going to the spark plugs, wrongfully drains to the engine block (ground). Today Nov 13, 2010, I removed the spark plug covers, removed the ignition coils, to expose the stems of the spark plugs, and I found all the cavities drenched, soaked, flooded, with engine oil. I am cleaning them up, one-by-one (it will take a good hours to do), and I am sure it will start. That is a fact. I have done it before. Today, I have cleaned and re-installed 4 plugs. Tomorrow I will finish the remaing 4 (left side - driver side - is more cramped and harder to access, but it is possible to do). Good luck with yours. I heard that many Jaguars S-type have this problem.
It sounds like it is a battery problem. Try getting a replacement battery for it.
Sounds like the battery is discharged.
Sounds like it could be low voltage Battery charged? Alternator working?
Its probably your fuel pump.....
Check the charge on the battery, it may be faulty even though its not old. If the battery is charged then the starter motor may be old, brushes wear out over time.
It starts because current flows easier in a warm battery. But any guessing about what the problem is needs to start with a charged battery, lead acid batteries need to be charged to 12.6v, if it won't charge to 12.6v, the battery needs replacing. It also sounds like your charging system may not be working right, which may have caused the battery to fail. With a charged battery check voltage at battery at 2500-3500rpm, it should read 13 to 14 volts, most bikes do not charge at idle.
Your battery sounds like it is dead. Get it charged or replace it with a new one. Then try to find what drained it so this will not repeat.
it sounds like your timing is out and needs re-adjusting. when the timing is out on this model it also affects the battery operation . simply put the battery isn't getting charged properley. don't replace the battery, just reset your timing and it should'NT stall any more!
About 20 hours fully charged, althought the volume level matters, so if you hav lo volume the battery will last a little longer. One of the other things that can use up battery life is bright flashing games with alot of bright lights flashing sounds and long periods of sound, for exaple Guitar hero..
Ya there is, I know this sounds silly and I'm not trying to trick you but if you take your battery out of your cell and take 2 leaves and connect them with your charger after awhile it will be charged
Sounds like your battery was weak to start with. What you did should not have caused any problems if your battery was in good condition so without seeing it, I think you should remove your battery and have your battery charged and load tested.
Sounds like a connection problem from the battery to the car. Easiest way to find out is to get a jump start from another car, if it works then it's the battery, if not then is either the battery cable or an alarm/immobiliser that is still armed.