I know that we have some Ford tuners who use other products here so I figured that I'd ask the question and see if anyone has encountered this and has a fix. My father has a 2007 Mustang GT and has an SCT handheld with a custom tune on it. The car is 100% stock down to the air filter. When he starts the car cold, the idle will hang at about 3k for a few seconds before settling down. I talked to the tuner (and have seen it myself in 100% stock 4.6L 3V vehicles) but he's not sure what's causing it. My wife's '06 Mountaineer hangs at about 2k rpm on startup so it seems to me that something in the tune is exacerbating the situation.
Has anyone seen this? Do you have a fix so I can talk to the tuner and have him modify the tune? What parameters should I log to try to diagnose it?
Thanks,
Matt