I brought me a rs turbo the other week on the road with tax mot and running

Anyway I parked it up on my drive with a cover over it done few little jobs to it like vacuum it clean it etc and just make sure everything was tidy under the bonnet. Car still running.

Then went to it a few days ago and it's a no go would start for love na money

So I've

Checked timing
Checked spark
Checked wiring
Checked for air leaks

Changed dizzy
Changed leads
Changed injectors
Changed ecu
Changed plugs and leads

Still no go

Car turns over fine but just won't fire seems to just fill the bores of fuel also has a funny squeak when the pump primes from under the bonnet

If I remove the fuel pump relay after a few cranks it will fire but wont start guess thi is no fuel has relay unplugged

So any ideas it really isndriving me mad now and I have no other idea what it could be

Any help would be great thank you