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Topic Review (Newest First)
Today 04:23 PM
frizz I put in the $3 velocity stack that the ST uses and it sure seems to further improve smoothness at low RPM. Really, for $3 if it's just placebo effect, it's worth it.
10-15-2014 07:25 PM
Originally Posted by Special K 17 View Post
Honestly, it seems to be running normal. It may have felt a little sluggish accelerating onto the highway today but I was bogged down with a few passengers, but that may have been me just trying to convince myself there was an issue. I didn't notice any surging or stalling. And its not throwing me any check engine lights or errors.

Its making me think that its fine, its just that massive drop in the MPGs the computer was showing is frightening. I did around 150 miles at about 75 mph today and wound up with the computer showing me about 32mpg, which isn't terrible, but still seems low to me.

And I'd love for it to be under warranty, but something tells me I'd be paying out of pocket to get it fixed, if its broken.
Hey, just wanted to let you know that I get about 31-34 in my Focus driving 75 on the interstate. So I wouldn't say that it's too low. To get above 35 consistently I have to slow down to closer to 70.
10-13-2014 07:03 AM
Tigeo The way to check is to turn on the car, hop out and look into the front grill. You should see them open/close as a check routine when the car is started.
10-12-2014 10:25 PM
Elizabeth It is possible to LOOK into the front and see the shutters. On my car I have seen them open, and at other times closed with the engine off and the car parked.
If they never opened the car would certainly overheat.
If they never closed? Not much except a small decrease in mpgs.
10-12-2014 08:30 PM
Originally Posted by Kona blue sel hatch View Post
How can you tell what the shutters are doing?
It's hard if you're driving the car, but if you look through the grille when the car is idling you can see if they are open or closed.

There should be a way to measure the states using a scan tool such as Ford's IDS tool, but otherwise I'm not sure exactly.

In winter especially with a cold engine and the heat and defrost running the shutters are usually fully closed. They tend to change states depending on vehicle speed and load as well as required engine cooling temperature.
10-12-2014 08:15 PM
Kona blue sel hatch How can you tell what the shutters are doing?
10-12-2014 12:33 PM
Originally Posted by F35-JSF View Post
From what I remember earlier in this thread, removing the snorkel prevents the shutters from sealing off the bay. Could be costing you a mile or two.
No that could only occur if you removed the rubber shroud that's sealed to the bumper cover. The snorkel in and of it self does not have any affect on the engine bay sealing. It's strictly an NVH reducing device.

For example here's my ST prior to the intercooler swap. The n/a snorkel would not block the shutters.

Rubber shroud.
10-12-2014 12:03 PM
F35-JSF From what I remember earlier in this thread, removing the snorkel prevents the shutters from sealing off the bay. Could be costing you a mile or two.
10-12-2014 11:44 AM
dyn085 If the car still appears to be running normally, I would give it a couple of tanks of normal driving to see, and definitely check your mileage with hand calculations. If your driving is the same and your connections are all secure then mileage should be at least the same, if not slightly better.
10-12-2014 11:42 AM
stuff1138 Taking the snorkel out doesn't break anything. It should not affect your MPG. If you are noticing lower MPGs it could be how you're driving. Coast more.
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