Misfiring

Possible Multi-Displacement issues.

How do I find out if my truck has the mds on it

I thought it was standard on the hemi's but look at the emissions sticker under the hood.

Tow mode deactivates the MDS which is the reason for my first post.

I don't know nothing about a hemi this is my first one I didn't hear it till I cut my muffler off now it has a little rumble to it it sounds like a helicopter wen I don't have tow drive on

I'll look it to it and see if I can find the proble then thanks for the help because like I said I kno nothing about hemis

Google the MDS for starters.

Ok thanks

The hemi's have a special exhaust system so they don't sound like crap when running on 4 cylinders.

Makes since thanks that helps alot

check your wires on the coils you might not have 1 connecting right and it would cause a missfire.