08 taurus limited sputters when accellerating from 62 mph or going up hill.

SOURCE: 2002 Taurus 24v OHC

Check engine light is frequently a loose fuel cap, but the other problem could be a bad fuel pump, or a clogged fuel filter. Try the fuel filter first - its the cheapest.

SOURCE: Sputtering Engine

This is normal. Four cylinder engines do not have a lot of horsepower and torque.

When your a/c compressor and cooling fan kick on, there is a load on your engine that casues rpm to drop. When it kicks off, the load goes away and the rpms go back up.

Your a/c system is the cycling type that increases fuel economy. It should cycle 4 to 7 times/minute at 70 degrees F.

Please rae as fixed if this answers your question.

PS. With the a/c (and defrost) off, it should not drop any rpms.

SOURCE: 2005 Ford Taurus Sputtering

stickingvalves collapsed lifters bent push rods fault ignition or damadged spark plug wires start it up at night look under the hood for sparks jumping from wires replace fauilty wires

SOURCE: 1999 windstar sputters

buy manual, have scanner ran, you can buy a cheap one at auto parts store, check throttle position sensor if it has one

SOURCE: engine seems to miss / sputter between 30 mph and

Hi Nascar2nd.
From what you are describing it appears like an engine misfire.
These trucks are notorious for bad ignition coils.
They don't always set a code either, it depends on several factors.
To check these out in my shop there is a mode in our scan tool called "mode 6". This allows us to look at certain engine data parameters to look at misfire to locate the offending cylinder(s).
Unfortunately without the use of a scan tool you will not be able to see this.
It may be in your best interests to get a shop to look at this for you and verify the bad cylinder.
I have had issues with aftermarket coils and use Ford originals exclusively now. They have also reduced the price of them, good thing too because we go through many.
Might be an opportune time to replace spark plugs as well. worn spark plugs can accelerate coil failure as a worn plug takes more energy to fire.
Thank you for using FixYa !