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It's  a 90 skyline [R32] 4 doors with an RB25,  no alarm, it was at a shop getting a turbo installed, when it was done I pick up the car and drove it home with no problem and two mintues later get back in it and it will not run. It does crank over, no fuel pressure, no spark at the plugs.

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Did you start the car when you picked it up, or was it already running.

And when you turn the key in the ignition do the red lights come on in the dash (and for bonus question, if you listen near the passenger footwell can you hear a relay turn on when you turn the key to ignition and off about 5 seconds after you turn it back to ACC.

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There are either 1 or 2 blue relays there depending on build date, the first of them turns the ECU on (or off) and the other if present is for the coils. As you have no fuel pressure, no spark that implies no ECU as the next step to look at.

But I've jumped well ahead, first you need to check all fuses in next to the battery, and also at the driver's knee. Very possible something important was moved during the work then shorted on your trip home blowing the fuse. Also check all connections are present at the battery

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