Ignition problems.starting first thing in the morning is difficult if not at all.its a 3 litre diesel auto 1999.Had the injectures doneoil pressure sensor changed and a new battery put in.seems like a fuel issue.

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You used the ignition key to turn the red button and now neither inside or outside will open the door? It is broken, you need an auto locksmith to jimmi the door and fix whatever has come adrift inside the door panel.

Do a scan of the car computer, go to a garage and have it connected to a code reader, that will tell you what the problem is.

TRY WAITING A FEW MINUTES AFTER TURNING THE KEY BEFORE TURNING IT TO START

Try checking the ignition control module. It may be on the verge of going bad. You can easily remove it and take it to a parts store, most have a tester just to test those modules. List Ignition Module Control Unit Ignitor 1995 Ford 150 Reilly Auto Parts http://ww2.justanswer.com/uploads/tsmodie/2011-05-31_161338_1.gif

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sounds like the linkage from the ignition lock cylinder to the ignition switch is broken.

So what do you have for voltage at the battery? Sounds like the alternator went bad. There should be around 14 volts at the battery with the engine running. Anything less and the alternator would be the first thing I suspected.

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check up the injection coil and the module

This problem is usually caused by a failing neutral safety switch. Try moving the shifter when it is dead. Will it start in neutral? Move the shifter while trying to start (foot on brake!)

Several causes possible.
Carburattor or injection type?
Carburator >> auto choke faulty.
Carburator >> mixture very wrong adjusted
Drawning carburator (needle/floater)
Distributor weights cannot move (dirt/rust spring broken)
Very dirty airfilter, or clogged airfilter
Faulty ignition cap. Check contacts, especially middle one if oldfashioned and nonelectronical.
Ignition timing set incorrectly.
Fuel pump broken.
Fuel filter blocked almost.
Vacuum line damaged.
Exhaust internally clogged by loose plate (corrossion) (potato in tailpipe effect).
And very seldom, water or diesel.

And a list of a lot of other things.

I think in most cases you may have a weak fuel pump or a clogged fuel filter. Even though your fuel system is run by pressure it doesn't always prevent the car from stalling if the engine is starved because of a bad filter or faulty fuel pump