p0308 is a cylinder 8 misfire , can be several reasons why
Trouble code P0316 means: Misfire in the First 1000 Revolutions
missfire detected upon startup (first 1000 rpm)
Trouble code P0308 means: Cylinder #8 misfire detected
Your PCM is detecting a misfire with in the first 1000 revolutions of engine start up. This code is usually but not always accompanied by a cylinder specific misfire code.
Misfire in Cylinder No. 8.
P0308 is cylinder #8 misfire. See related question below for info about misfires.
Trouble code P0302 means: Cylinder 2 Misfire Detected
That is a cylinder number eight misfire.
P0316 - engine misfire detected at startup ( first 1000 revolutions ) P0303 - # 3 engine cylinder misfire detected The engine cylinder locations are numbered : firewall 4 - 8 3 - 7 2 - 6 1 - 5 front I did a Google search on Ford trouble code P0316 and it seems like that one can come up on the Ford F-150 if it is humid / foggy / raining
The Ford diagnostic code 316 is a misfire detected at engine start up.
EVAP Purge Solenoid Stuck Open or Closed
Cylinder #8 misfire. Something is causing #8 to not fire properly, suggest you start with a tune up.