FusionDiffusion

FYI there is a new customer satisfaction program for this that came out today, the program number is 22G04. You can now have this BECM/PCM update performed free of charge through Sept 30, 2023. Letters will be sent out in a couple weeks. You are eligible for a refund if you paid to have this performed at a dealer previously, and can provide documentation. I think every owner will want this done. Title: Application Performance Upgrade 22G04 Certain 2010 – 2012 Model Year Fusion / MKZ / Milan Hybrid Vehicles Hybrid Battery Reduced Electric Vehicle Operation BECM and PCM Software Update

Maybe it's a cell balancing issue. Since it's a new car I would try to get the battery charged up as much as possible and then try to run it down in EV as much as possible for a few cycles. Can you initiate a cell rebalancing cycle yourself? It could also be a temperature issue in your case. Cold batteries are harder (more inefficient) to charge. Continuous charging would help warm up the batteries if they were cold. Covering the grille and letting the ICE run for 20 minutes continuously also probably helped you get up to operating temp there.

Say you're going down a fairly steep hill with the cruise control engaged. As you pick up speed will the car do anything to limit or reduce your speed back to the set point? Some of the cars I've driven do this by downshifting the transmission (engine braking), but I'm wondering how the hybrids handle it. Does it raise the CVT gear ratio for engine braking or does the car use the regenerative brakes (or both)? Also, with adaptive cruise control what happens when a slow car changes lanes in front of you and the car has to slow down faster than normal? I know the ACC can apply the hydraulic brakes to some degree on the non-hybrids, but is regenerative braking used instead on the hybrids? Is there any difference in behavior with EcoCruise vs. regular cruise for any of the above? Hill descent mode?

BLIS is 24 GHz (K-band) I believe.

The radar sensor is located behind the driver's side of the lower grille. You should notice one side of the grille is different than the other. There is a picture in the owner's manual. From what I understand, the warning will only sound if the system detects an imminent collision. If your foot was already on the brake (even slightly) I don't think it will sound the alert.

The block heaters they use in cars are a lot smaller than than the 1500W heaters they put in diesel trucks. I would still only use one on a timer to reduce the electric bill. The block heater is too small to provide "immediate heat" but it's more like "short delay heat". I wrote a detailed article about block heaters about a year ago on FFF: http://www.fordfusionforum.com/topic/7355-about-block-heaters/ I don't have a FFH, but my guess would be they use the same size element in all Fusions.

Nitrogen has almost no practical benefits for typical passenger car use. If you're racing a car on a track and really heating up the tires then you want nitrogen to help control the pressures. But as shaggy mentioned, air is 78% nitrogen already so difference is not noticeable with typical highway usage. It's much more important the air going in is dry to prevent condensation inside the tire/wheel when it cools off.

DRLs use the low beam on the Fusion. There is a FET inside the SJB that uses PWM to lower the brightness of the low beams for DRL use. Actually all Fusions have this dimming circuitry because it's used to control normal headlight brightness when the car is on, so you should be able to enable DRL by just changing a software setting. Fords usually use the low beams for DRLs, but I know other makes that use the high beams to even out the wear on the bulbs.