Ford Mustang runs rough, no power (code P0300). EASY FIX. 2005-2014, V6 

lmk

Hard to know but the AC system doesn't directly tie into ignition or anything like that. Instead, turning on the AC puts a strain on the engine, so I'm thinking your AC just makes your problem show up, it's not actually causing it. In other words, fixing the AC system isn't the issue; it's likely related to needing a tune-up (spark plugs, fuel filter, etc.).

Good luck!

@@FixEverythingYourself thank you!

You could. It could still be something as simple as a spark plug or spark plug wire, not necessarily the coil. You could inspect that specific spark plug and if it's really bad, I'd replace that first before the coil. Or if wires are in really bad shape, you might consider replacing those. I think I'd start with the plug, then coil. You could also swap plug 3 with another plug and see if the code moves to that other cylinder. If so, it's the plug.

@@FixEverythingYourselfI ended up buying a whole coil wires and 6 plugs we gonna start fresh

@Kb-ng5cr 👍👍

@@FixEverythingYourself so I did the switch I’m not sure what’s my next go to I had a whole tune up but it says faulty cylinder e misfire detected evap which I’m not too worried about right now it says very small leak control system fuel cap I’m thinking it’s a whole cylinder at this point I just bought this from a guy for 2300 I feel like it was a steal anyways he said it’s a new engine it’s not perfect but it’s new but I wanted another car I took it I tried with a dealer on a Chrysler 300 they called me the n word made me go back n forth for repairs charging me way more than my papers say and claimed they put a new engine in it was given 12k to do so but I got pictures of holes and cement on the engine

Jus saying this ain’t the worse car issue I have had

Did u figure it out I got random misfire plus misfires after trying to solve p0171