Rough idle no codes

[Vapor2.3]

Hey I have a 2015 2.3L mustang

I have heard all the "fixes" for Missfires at idel and startup I've tried all of them I need serious help

-I have replaced the plugs about 2 months ago and they were gapped at 0.28 to my memory
-I have replaced my fuel injectors and LPF sensor
-I have replaced the purge valve as well
-I am running shell 91 fuel
-I cleaned the intake valves with CRC cleaner
-I am not loosing coolant the level has stayed consistent for months
-I have a catch can Installed and it's the 3 port passenger side one I'm also gonna replace it soon because I got a UPR catch can I am also going to change my PCV to a gutted PCV to see if that does anything
-my blow off valve is set at a good medium pressure
-my air filter is a air raid intake with cone filter and it's clean
-no engine codes present other than high crank case pressure

Please someone help with this issue I've been dealing with it for almost a year and haven't been able to fix it




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[Jstang23]

Is your car tuned?

 

[Vapor2.3]

Is your car tuned?

I have a tune it's just a basic tune with my parts because I haven't finished it because of the Missfire

Right now I have my cobb tuner uninstalled and I'm running stock tune

 

[Jstang23]

If your car is tuned in any way the idle is 99% of the time a problem with your tune. Its also possible some of the parts you installed require a tune and won't work well with the stock tune.

 

[Vapor2.3]

Naw right now if I have the tune on it still Missfires and pulls timing when driving

It only miss fires at idle
And according to Adam it pulls timing when driving

 

[ing3nious]

Start taking parts off and see if you can pinpoint the problem.

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