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RE: 2005 E450 Ford V10 intermittent misfires
CEL can light-up due to a bad or dirty electrical connection from the ECU to the sensor.
My mechanic always checked that at my service intervals.
And specifically throw only cylinder misfire codes (P0300 & P030X), no other codes?
We’re talking once a mile or so.
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katleman
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08/21/23 12:08pm |
Class C Motorhomes
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RE: 2005 E450 Ford V10 intermittent misfires
Did you check your battery voltage? Had a similar situation once where after I would stop for a short while and when restarted, it would run rough and throw codes till I got up to speed. Turned out battery was bad and till the alternator built up voltage, this would happen. New battery solved the problem.
Battery is new this season, replaced proactively, not out of need.
The codes are thrown at idle, up hills, down hills, doesn’t appear to vary with load.
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katleman
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08/21/23 08:11am |
Class C Motorhomes
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RE: 2005 E450 Ford V10 intermittent misfires
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.
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katleman
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08/20/23 11:00pm |
Class C Motorhomes
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