P0300 and P0172

[jafo2424]

TB just started misfiring. Pulled code p0300 - multiple misfires.
Not a specific cylinder. Where should I start?

 

[BlazingTrails]

Thread 1

Thread 2

Thread 3

 

[KNBlazer]

TB just started misfiring. Pulled code p0300 - multiple misfires.
Not a specific cylinder. Where should I start?

Pull 1 coil connector at a time plugging it back in until you find the cylinder that shows no change at idle, such as a stumble.... when you find the bad coil, swap it with a different cylinder, if problem follows the coil, you will need a new coil.... if the problem doesn't follow the coil, you'll need to check spark plug....

 

[jafo2424]

Once again Thanks Fellas!!!!!

Had a bad coil pack in #6
Changed coil pack and replaced all the spark plugs.

Running Sweet again (With 229,300 miles I will add) and best yet, NO CODES !!

 

[HARDTRAILZ]

Glad the site could help you out!