2005 E450 Ford V10 intermittent misfires
My 2005 class C is built on a 2004 frame with the Ford V10 in it. It has developed an intermittent misfire this year but not enough to give a CEL. Google searches tells me that it probably needs...
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Been up in Alaska all summer, my 2016 E450 Ford V10 (26,000 miles) has had the CEL on for the past five weeks. According to my OBD2 scanner, it first started throwing P0300 (generic misfire), then it claimed cylinder 2 was the culprit (P0302)
Replaced the air filter as it was filthy. Nope.
At the point its flagging 4 different cylinders, split between the two sides, had a mechanic diagnose it, suggested bad fuel or water. Tossed in SeaFoam and iso Heat. Nope
Refusing to believe it’s the plugs/coils on 4 cylinders, as they are good for 100k miles, tried replacing the MAF sensor. Nope.
Bit the bullet and replaced all the plugs and coils. Nope.
All through this period of misfires, which was flashing the CEL once a mile, no loss of power, no loss of fuel economy, drove just as it always has.
So I’m heading homeward with the CEL flashing, run out of things to check or replace. Stumped every mechanic I have consulted.
Replaced the air filter as it was filthy. Nope.
At the point its flagging 4 different cylinders, split between the two sides, had a mechanic diagnose it, suggested bad fuel or water. Tossed in SeaFoam and iso Heat. Nope
Refusing to believe it’s the plugs/coils on 4 cylinders, as they are good for 100k miles, tried replacing the MAF sensor. Nope.
Bit the bullet and replaced all the plugs and coils. Nope.
All through this period of misfires, which was flashing the CEL once a mile, no loss of power, no loss of fuel economy, drove just as it always has.
So I’m heading homeward with the CEL flashing, run out of things to check or replace. Stumped every mechanic I have consulted.
