Clio 172 won't start

I have a ph2 172 that won't start, it just turns over sometimes rumbles into life then dies straight away but not always. If you unplug the fuel pump fuse and put it back in and turn it over it will start then die.
The timing is perfect, also tried another ecu and uch still done the same as it's not an immobiliser fault light goes out as it should.
Diagnostics was showing Tps pedal circuit a but cleared after a few attempts. When I checked on live data I was getting 180+rpm on engine speed which jumps up and down.

Any help would be greatly appreciated.

Any ideas ??

Can anyone give me an idea what I should be checking/testing

can you hear the feul pump priming when you switch the ignition on (before cranking)?
Have you checked the fuel filter isn't blocked?
have you taken off the injector rail an made sure they are spraying / working?
have you tested the coil pack?
how do you know the timing is not wrong?
have you checked the tdc sensor?
have you checked if you have pressure in all the chambers?

The car was in a friends garage to get fixed and all he changed on it was the coil pack and tdc sensor. He checked the timing and said it was bang on. So I manage to get it because they don't know what's wrong with it.

Fuel pump primes
Coil pack tested
Got compression
Injectors are spraying but don't think it's spraying properly

It's like the fuel cuts off as it's about to start like an immobiler problem but lights going out as it should.

I will try my working injectors from my other one

Thanks for the reply

Mine same put new bottom end new plugs ect new gaskets timed up with right tools ect just turns over just don't start could it be timeing iv got the right tools ect but everything seems right all tools slot in no problem got spark n fuel going to it got to puzzling me

Step 1 - What is the red LED on the clockset doing when you turn the key: On/Flashing 1Hz, On/Flashing 4Hz, On/Solid & stays on, On/Solid then goes out?

have same problem also pal will start and then run with enough easystart but runs like its cammed up and stalls under load and harsh throttle
just done:
cps and wiring
oil and gen filter elf 5-40
cambelt and dephaser timing good
coilpackplugs and leads
all new gaskets and seals on inlet, cleaned everything icv throttle ect new inlet and breather pipes all this is genuine renault
good injector signals imob light going out as it should
Fuel pump primes
Got good compression
Injectors are spraying but don't think it's spraying properly also

am now thinking injectors,cts,lambda but don't know enough about these cars any help would be appreciated