Reply To: Engine does not rev up

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Then you should arm yourself with the electric schematics from the FSM and try and make sense of the circuits that may be involved and see if the current passes through any relays and fuses, then replace them.

This is what I ended up doing when I had an old 3d gen Maxima that liked to stall randomly. Found that it was the relay powering the ECU, tachometer and fuel pump.

Best of luck, as I have no clue what else to suggest 🙁