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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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Is the hesitation gone now or still there? Do you feel a misfire now? Do you have a scan tool or something similar to read the live data and share tbe fuel trims on idle?
No hesitation at all. It feels much better from idle to High Point on throttle even after warming up. No feeling of misfire no codes everything besides fuel mileage seems perfect. I mean it drops drastically quick from the digital readout on the dash and on how many miles left till empty it went down about 7 miles in about a 2 mi range
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