truck not going over 75 - Ford Powerstroke Diesel Forum
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Old 01-24-2014, 06:05 AM
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truck not going over 75

Friend of mine has a 6.7 i talked him into buying. he called last night a couple of states away and has been having issues. It is out of warranty and he hasn't deleted yet but they replaced a fuel pressure regulator on one side and now tell him it is the hpfp. It will drive okay up to 75 mph last night while pulling a 4000 lb enclosed trailer. I am not a diesel mechanic but the longer I talked to him the more it seemed like a fuel supply problem not a hpfp problem. I would think if you could get to 75 and it won't go any higher it is running out of fuel but more likely it is a volume problem of it getting to the hp pump rather than the hpfp not working properly.

Any advice would be great. He doesn't have a scanner but is supposed to go by autozone tonight and get the code for the check engine light so i can research it for him
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Old 01-27-2014, 04:25 PM
lug lug is offline
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MyKey Does he have this? Previous owner could have set a reduced speed assigned to that key.
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Old 01-28-2014, 05:44 AM
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Agree with lug. He needs to check the MyKey. If a top speed was set, he should be able to clear it using the dash menu.
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Old 01-28-2014, 05:49 AM
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It def. sounds like previous owner has setup Mykey with a speed limiter. Hopefully this is the culprit.
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Old 01-28-2014, 06:08 AM
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It's throwing codes dealer has been throwing parts at it and says is hpfp that just doest sound right based on his explanation.

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Old 01-28-2014, 08:24 AM
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The shop he went to is looking to make big $$$$ from an out-of-towner! Start with the cheap stuff; fuel filters if the mykey isn't the fix. Make sure he's at the shop to see what's in the filters when they pull them, too. DON'T trust them.
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Old 01-28-2014, 10:09 AM
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He said he had just had filters changed and watched them do it but I recommended him try replacing again just in case had a bad filter

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Old 02-08-2014, 06:08 PM
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P228f is his error code

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