I completely missed this post when you made it. 9 times out of 10 when they can't reflash the PCM is because there's already a modified calibration residing in there. At least that's what I've seen from similar previous instances.the Ford dealership tried to install my performance pack today, but the car wouldn't take the software, they couldn't flash the pcm, so there is a no go there. Anybody have trouble with ford performance tunes? what could cause the pcm not to flash?
Now I am a bit confused. So you, not Ford, installed the genuine Ford PP tune?I was able to get my pcm flashed. the problem was the OBD port seems stubborn so it took a few tries to get the interface for the pro cal 3 calibration to power on. plus the interface was picky to which usb port on my laptop it liked to work with.
So your local Ford Service department was unable to flash your computer, however a local tuner got it to work. I'm surprised Ford isn't bitchin' about a 3rd party doing the install and then trying to void your power train warranty!no, I'm running the pro cal 3 tune from Ford performance
Oh! So the spark plugs weren't the stock ones huh? Do you happen to know what the model number was on those NGK's? Reason I ask is there really is no logical reason to replace the spark plugs on a stock Ecoboost at such a low mileage. Now if you were running more boost there is a logical reason to change to a plug with a different heat range. Did you swap out the stock Motorcraft plugs for the NGK's or did the previous owner?No, they went straight to blaming NGK sparkplugs lol