340hp marine power acting weird after 2500 rpm

[Rageboat paris]

Hi guys,
My engine marine power 340hp (injection with g force ) works perfectly until 2500 rpm after 2500 rpm it s misfiriring and rev gauge is going up and down.
I have New plugs /wires/distrutor/cap/coil/relays/both fuel fuel pumps seems to work fine.
Is some of you have an idea .
Thanks

[Rageboat paris]

Solved it.it was camshaft sensor that was bad.

[cltTige]

well that was quick. Glad you got it figured out!

[ptige]

How did you solve it; did a shop us a code reader?