Engine misfires, guages drop at cruising spd
 

First time poster - I have a 2007 300. At 25-30 minutes into freeway driving, the motor misfires or momentarily loses power and the speedo and tach needles drop to 0 and return to normal in the blink of an eye. Any idea where I should start looking or whether it is serious?

Just a couple symptoms are not near enough to even guess at what it might be on a computer controlled car. Any other info at all? Tach and Speedo are bussed info to the cluster from other modules.

Pull the OBDII codes. It might be as simple as cps.

Engine misfires, guages drop at cruising spd
 

New poster - I have a 2007 300. At 25-30 moments into highway generating, the engine misfires or briefly drops energy and the speedo and tach small needles fall to 0 and come back to regular in the flicker of an eye. Any concept where I should begin looking or whether it is serious?

Hi, did you find the fault to this problem? My Chrysler grand voyager is doing the same. Drives fine up to about 10miles in then starts to mis Fire and then also stall when aproaching a roundabout or about to stop. Error codes are
P0184
P1388
P1389
P0601
Any help or suggestions would be great full thank you

sorry guys I have been ill with food poison for two weeks and not enough energy to help out.