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Old 10-15-2007
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Mayday!

ok not really.

But seriously though. I need some professional help from the forum experts. I was driving back from hunting today on the freeway and I had my cruise set at about 76. when I went up a hill and it down shifted to keep speed it started to cut out at around 3500 RPMS. Then my check engine light starts flashing. After I get to the top and the RPMS drop back down its all good again , no CEL nothing and the truck runs fine. This happened a few times but when it idles it runs fine and when Im driving normal its fine. It seems like it only does it when the truck is under heavy load. I looked in the manual and it says flashing cel means misfire. Also I had the diagnostics checked and it said nothing stored. WTF! why is this happening. I dont know what the deal is please help.
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Old 10-15-2007
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nobody can help me?
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Old 10-15-2007
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Plugs, wires, fuel filter would be good possibilities. The flashing CEL means misfire detected in real time. Unless it persists long enough and/or the misfires are a high enough percentage of firing events, no code will be stored.

Last edited by V8 Level II; 10-15-2007 at 03:23 PM.
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Old 10-15-2007
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Quote:
Originally Posted by rwenzing
Plugs, wires, fuel filter would be good possibilities. The flashing CEL means misfire detected in real time. Unless it persists long enough and/or the misfires are a high enough percentage of firing events, no code will be stored.
Thanks Bob. I just changed the plugs (motorcraft) all were gapped properly etc. I will look into the wires and fuel filter. Thanks again.
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