S1 rb25det in a s2 r33 with s2 body loom

[Tomos 33]

Hi guys my r33 will not fire at all it cranks and fuel pump primes but I don't think I'm getting fuel I have a s2 r33 with the body loom and a s1 rb with the engine loom and Ecu

Some people have said its the plug behind the passenger side headlight, and others say it's the eccs relay near the ecu  can someone help

[Tomos 33]

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