ford sapphire 2.0 gli starting problem pinto engine

hi all my first time all im new and am looking desperatley for some help i own a 91 ford sapphire 2.0 gli, it gives me a starting problem in the mornings she starts up fine a runs well apart from a sometimes erratic idle or high idle  but after a short run she wont start up she has a very powerful swing and spark but she catch on. i have checked the fuel pump it seems to be working fine cos she doesnt cut off when running at high speed  140/160km/h  however when she does not start a little bit of fuel squirted into the intake and she fires up perfect.
 
any help or suggestions
spark plugs changed
fuel filter changed
all contacts to injectors checked
throttle body cleaned
idle valve cleaned
power feed to fuel  100%  also tried direct power to run pump continuos still wont start
plug leads as well as coil changed

Hi can you give us some more information about the car, is it a DOHC and has it the L Jetronic system on it, any other info will help as there were a lot of different engines and fuel management systems we need to know this so that we can assist you to sort it out, Just be aware that none of these models were released for sale over here so not many people would know about them
Thanks Dave
 

Test the fuel pump when you have the problem...  you need to test the pump not off the main rail feed but disconnect the return line to the fuel tank from the regulator -  therefore you are testing the pump under correct pressure. 
 
If you got 1.25lt in 15 seconds with no reg connected (i.e. taken off the main rail feed as you said) you may still have a problem.  I am assuming your car has the fuel reg after the fuel rail as per cossies.

i was browsing through the forum  in the parts for sale section there is a guy that has a pinto turbo head for sale i not too much trouble take a look a the pics mine is the exact same head and EFI injection setup  but without a turbo maybe that would help clarify what engine i have

As said remove the return line to the tank and measure the flow.....  3.5 lt per 30 seconds at no pressure (as you said taken from the fuel rail feed) is not a good test of whether the fuel pump is OK.  FWIW a bosch 044 pump (enough fuel to support 500HP) will flow 4.5lt per 60 seconds as measured from the return line to the tank (with a standard reg pressure 3 bar). 
 
Testing the fuel pump as you have suggested does not test it correctly.
 
 

i not ruling out the pump but for some reason or the other i not quite convinced, heres my theory and i stand to be corrected
i the pump cannot supply enough for start up hoe is it that you can hold a constant 4500rpm with not break or signs of fuel starvation i also held her at 140/160 km/h on the freeway for about 3km she runs like a dream sweet as anything  but you get home switch her off and try starting she just cranks but no start up if you run start she will fire up perfect so this is what leading me to think that it is fuel related yes but not ;purely the pump, look if i am wrong then so be it but im lacking proof
 

she start when cold after a short run you have a 2 out of 10 chance she may restart on the key if she doesnt then i can either run start her (dont like doing that) or i remove the vacumm pipe from the pressure regulator and place it into a bottle of fuel crank up from the key and she fires up i found the vacumm pipe way easier then always removing the intake pipe its quicker and less hassle. but i will give the battery a check as i have checked up the starter feeds as well as engine and chasiss earths anything else you can advise

i will look into the earth wiring again maybe even try a direct battery to engine earth, thanks guys i will certainly try also going to to a voltage test as lincoln suggested will post what happens ....thanks again guys if you stumble on any other suggestions please let me know appreciate all the help