ok, have this 02 sebring with the pos 2.7.. the oil light flickers at idle in gear.. but i have 25 psi.. and 70 at 3000 rpm.. changed the sender, its better but no go.. the timming system is new.. the primary tensioner makes a tick sound.. its pretty loud.. so i chaged it with the old one.. it got queiter.. should i change it for a chrysler unit? the heads were off and pretty clean.. could be sludge in the pan but with 25 psi? will a bad tensioner cause the light to flicker?