As far as a program being a red flag not so much! We can find it if it’s still in the PCM, a lot of times we see customers bringing there vehicles in that’s had a tuner and maybe has set a code and then they take the program out and with that will erase all freeze frame and codes from the system. Makes it hard to diag, customers need to recreate the concern without the tuner installed and then take to dealer! Tuners are a love/hate thing for me, I run them in a lot of my stuff but we see a lot of issues caused by them also. If ford gets involved with a problem veh they will and have found everyone I’ve had to deal with. For the ST we bought I’ll will not run one until I know all the issues are worked out. Most of the issues we have seen so far are calibration related, minus the trans coolers and stuff like that on the base explorers. All vehs made have issues for a fact! We traded a 17 limited explorer for the ST and we never had 1 issue with it so hopefully this ST will serve my wife well!
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