Hi

I have a issue that i think is ignition. Basically the car will idle fine. but it will pin out at 4 grand at any speed/accel i try.
A mechanic told me that the ignition is breaking up after 4 grand. So basically i need a new ignition pack?

things ive gone over.
Ran it through a obd2 no errors.
checked spark plugs. there fine.
fuel pressure test while running 58??? isnt it supposed to be 43?
fuel filter not plugged.
oil just changed.

what years the car?... what engine?...