My 1999 mercury sable 24VDohc is sputtering when I press the accelerator going down the highway, when I have the brake pressed and in drive it sputters. Changed fuel filter and used sea foam in tank.
I suspect a fuel pressure issue. Possible fuel regulator. Fuel pressure test would need to be done to determine what the problem is.
keep things simple replace fuel filter if it persists the follow the steps above^^^^^^^^
Might be a vacuum leak. Is the check engine light on? If yes, scan for the codes.
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