[eschaider]

The same logic that caused you to purchase that ECU 12 years ago is telling you to put a buzzer in to signal when your fuel system misbehaves.

Using a buzzer to monitor fuel pressure in a fuel-injected engine is like tying a horse to the back of a Model T, so you have a way to get home when the car breaks down.

Your buzzer solution and methodology are as fraught with problems as the original ECU selection and EFI purchase event was. Buy the right equipment, do the right job, the right way, the first time. It is much less expensive, and unlike right now, you will not be sorry you did.

Tuning is not a big issue. It is a one-day event (typically less) at a tuning shop—choose a reputable one, not a cheap one.

Try doing things the right way the first time. You will have fewer challenges down the road.