Ford FreestarThe Ford Freestar is a solid, highly capable minivan that performs well and offers all the latest safety features. Much of the Freestar's structure and design came from the Windstar it replaced. Windstar offered class-leading safety and solid performance for its time. Freestar is the highest quality minivan it has ever built.
Ever since I got my new tranny and then new fuel injector after failure of both within a couple weeks about a month ago, my Monterey has been idling rougher than it used to. Even my non-tech savvy wife notices it especially if in park, but also noticeable when stopped in drive.
Took it to the Ford dealer and spent 80 bucks for them to do a "pressure test" only to be told everything is checking out A-OK and that they notice a slight roughness in the idle, but that it's "normal."
I know it's not "normal" because it never did it before the new tranny and sometimes it feels so rough when in park, it feels like it's going to sputter and stall. But nope, Ford tells me I'm nuts and it's "normal" because the precious "pressure test" machine says everything is fine and also if there are no codes thrown, there must be nothing wrong, and sure enough, no engine light.
When driving, it feels fine. It's only noticeable when stopped in drive, and even more noticeable when idling in park. And it's since the new tranny.
I would like to know the cause to, but mine has always idled rough in my opinion. The other thing is that it constantly misses when driving around 40mph in OD. changing the plugs will cure this problem for a few thousand miles and then it starts again. No code ever been thrown for it. I just learned to live with it. I know its a misfire and not the transmission to. as its been replaced twice now under warranty.
My brother thinks the tranny really shouldn't be in OD at anything less than 45mph, but said you have no control. it will stay in OD as low as 37mph before coming out on its own. I usually remove my foot completely from the throttle which will result in OD dissengagement at any speed. Once the RPM's come up over 2k, then the miss is gone. It only occurs during that speed / RPM.
Wish the OD engagement point could be modified. Driving around in 3 at those speeds causes a major hit in my already low MPG, plus 4th is appropriate, but just not the lockup.
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Rough Idle 
Hybrid Mode
