my check engine light came on on my 1999 dodge ram 1500

I had it scanned and it said P0308 Cylinder 8 Misfire

What can cause this is it a bad spark plug maybe? i have noticed it is hesitating and idleing kind of rough

 

Did you ever have the engine DE carbonized
Cleaned out.

Try some Fuel system cleaner try the one from dealer
OR try the Chevron system cleaner.

 

I have a 1996 dodge ram indy edition and my engine light kept coming on and it also showed what your saying. somehow or another it ended up being my map sensor.

 

Swap the plug and spark plug to another cylinder and see if misfire code moves to that cylinder. If so then time a full tune-up. If code stays same then I would suspect its time for a valve job, they are know for dropping valve seats and/or breaking valve springs. Compression test or leak down test can confirm.

Buck