2.7i Swap and no start

[bluebeamer]

I have recently completed my 2.7i swap, using a 2.5 head with a cam and 20lb injectors and a 2.7 block. I had an 87 325e so when I got my donor engine and wiring harness I got one from an 87 325i. I am using a 173 ecu with a sssquid chip in it built for the swap.

Engine cranks hard but will not fire, the fuel pump relay will receive power sometimes and sometimes it won't so I have jumped the relay so it will always come on.

I have tired or replaced:

2 different cps ( same problems sometimes fuel pump turn on sometimes won't and not firing)

Redid the timing ( produced a hotter spark once it was done but nothing)

Took fuel injectors out of head placed a towel under all of them and turned car over and fuel came out ( they must be getting a pulse)

Readjustaded all the valves ( they were a little tight so now back to specs)

Tired swapping ecu from my 89IX, ecu ended in 350 ( once done i had no spark at all which was weird )

Tried putting in the original chip for the ecu (same problems : intermittent fuel pump and no start)

Tried a different AFM

Any input would be amazing so confused

[bluebeamer]

By adjusting timing the tensioner was loose so i got everything back to TDC and then tightened the tensioner.

Thats the weird thing, I can leave it for an hour and I get both spark and fuel, come back and the fuel relay won't get power but ill have spark still.

[bluebeamer]

Bridged pin 30 and 87 on fuel pump relay, car fires right up. I have tried 3 different relays for the fuel pump and nothing ha worked only when I bridge them.

[bluebeamer]

Jumped pin 30,87,87 on the main relay and fuel pump didn't turn on.

[HairyScreech]

Pop the plastic cover off the fuel pump relay, you can then press the tab on the side and close/operate it like a manual switch. Should allow you to run the pump at will.

Are you getting a good spark to the plugs?

Whats your battery voltage? Does it drop badly when cranking?