2012 Ford Edge with a 3.5 l. I recently purchased this vehicle from the original owner with 170,000 miles on it. Notice it had hesitation after warming up on Highway on acceleration. It had actually thrown a code a few times after checking one of the codes was emissions and one was misfire cylinder 3 so at this point I decided to change the plugs and check the coils which I also ended up cleaning the PCV valve. I did replace the old intake gasket with a new one and applied Dielectric grease to the plugs. But it seems now that I’m getting a lot worse fuel mileage. Is there anything I can go back and double check or any noticeable reason why this would be happening? Thank you for your help. I’ve always reverted to your YouTube channel for reassurance on any task I undertake Automotive wise.
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