4.6L Mysterious Misfire - Page 2 - Ford Truck Enthusiasts Forums



1997-2006 Expedition & Navigator 1997 - 2002 and 2003 - 2006 Ford Expedition and Lincoln Navigator Discussion

4.6L Mysterious Misfire

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Old 02-09-2014, 09:13 PM
acasia acasia is offline
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Same issue bucks and check engine light replaced three coils and after a day it progressively got worse this time we received no codes, finally replaced all the coils and a vacuum line from the master cylinder and it seems everything has come back to the norm with a definite improvement in fuel mileage first road test was 200 miles towing another vehicle and no issues bottom line i suggest replacing all coils at the same time
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Old 12-21-2016, 05:06 PM
Billy Regis Billy Regis is offline
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Rough idle 4.6

My 2002 ford explorer 4.6,I've replaced the intake manifold, new cop's,brand new plugs.....my idle is rough, my oil pressure dummy gauge drops to zero at idle, goes back up when accelerate. I've replaced the pressure switch. If anyone else can please give me some input,it will be greatly appreciated.
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Old 12-21-2016, 11:01 PM
alloro alloro is offline
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Originally Posted by Billy Regis View Post
My 2002 ford explorer
This is the expedition forum.
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02, 46, 46l, 97, 98, davidson, expedition, f150, feals, ford, harley, liter, misfire, pcm, time, v8

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