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2004 to 2008 F-150 and Mark-LT
4.2L, 4.6L and 5.4L equipped F-150s and Mark-LTs.


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Old Thu, December 1st, 2011, 09:27 PM
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Jackpine Jackpine is offline
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Quote:
Originally Posted by Longshot270 View Post
Doesn't sound like the tune based on what happened. Too bad you didn't hook it up to the computer before reflashing back to stock. That wipes the memory.

The drop to 800 RPM while going 50 is strange. Limp home mode would have dropped it into 3rd gear if I'm not mistaken. Doing so would have kept the RPMs pretty high.

Have you checked all the fluid levels?
Yes, and limp home puts it on 4 cylinders, so it runs poorly, but it can be driven. I was not really too much in favor of calling it limp home.

The low rpms really just sound to me like fuel (or air) starvation, either would cut the other.

- Jack
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