Hi i been own this Chrysler LHS 3.5L 150K miles, for over 2 year now, it start giving me problem since last month,

when im driving the interior light keep flashing, in the day time I just ignore it, but when it night , it on all the time and it flashing,

some weir noise under driver side when im go above 15mph, sound like something is holding the engine back, the car idle smooth, but when it go above 15mph it start slugging down, and it making that urgggggggggggggggg noise.

car give me no code. and I did change platium plug ( champion ).

Please help me please.