2004 F350 6.0 wont rev past 2500 when engine warms up - Ford Powerstroke Diesel Forum
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post #1 of 12 Old 10-19-2013, 05:10 PM Thread Starter
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[SOLVED] 2004 F350 6.0 wont rev past 2500 when engine warms up

I have a 2004 F350. When the engine gets up to temp it wont rev past 2500 rpm, and sometimes 3000 rpm. I do notice a slight power loss under 2500 rpm, when its happening, but as long as it doesn't reach 2500 I can drive around just fine, even go on the highway. If I shut down the engine, and restart immediately everything seems normal, lots of power, revs normally, but the problem comes back quickly. Now when its happening, at WOT, it wont rev past 2500, and I turn the key off and on quickly it takes off, high revving, plenty of power, and because of this I think its going into "safe mode" or "limp mode", or whatever it may be. As far as I know at this point, it does not happen when the engine is cold, but living in Florida it doesn't take long to reach normal temp. Also when its doing it if im at WOT I notice some white smoke coming from the exhaust and it sometimes backfires out of the intake. I did check the entire intake system for leaks, I don't think there are any, and I also changed both fuel filters and air filter. im not really sure where to start looking, if someone can point me in the right direction that would be great

SOLVED: BAD EBP SENSOR - truck thought it was boosting 40psi

Last edited by mkeevo; 01-22-2014 at 11:57 AM.
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post #2 of 12 Old 10-21-2013, 04:50 PM Thread Starter
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anyone have an idea?
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post #3 of 12 Old 10-21-2013, 05:01 PM
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typically the white smoke signifies head gaskets and or turbo failure. I had the same problem for a little while, I changed the oil and it hasn't happened since. These trucks are temperamental about their oil. Figured id at least try to give some advice.

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post #4 of 12 Old 10-21-2013, 05:31 PM Thread Starter
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yah I think im going to check the oil filter and ipr valve (if I can locate it)
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post #5 of 12 Old 10-22-2013, 05:34 AM
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Do you have any gauges? Even a ScanGauge-2 in this case may help immensely. Have you checked to see if it's thrown any codes?

It could be vanes sticking, could be low fuel pressure, could be ipr, could be a lot of things.

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post #6 of 12 Old 10-22-2013, 06:37 AM Thread Starter
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i have no gauges and ive had the codes checked...all clear what vanes?
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post #7 of 12 Old 01-14-2014, 01:59 PM Thread Starter
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post #8 of 12 Old 01-15-2014, 09:39 AM
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I just had this same problem before Christmas. Mine ended up being the HPOP gone bad. Check that we well.
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post #9 of 12 Old 01-15-2014, 09:46 AM Thread Starter
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Quote:
Originally Posted by 04Powerstroke60 View Post
I just had this same problem before Christmas. Mine ended up being the HPOP gone bad. Check that we well.
Luckily my HPOP is good


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post #10 of 12 Old 01-18-2014, 03:31 PM
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Hey everyone I'm having the same problem except it happens even if the engine is cold. I can't get past 2500 rpm even at wot. I'm running ford filters and t6 oil. This problem just started a few weeks ago after my fuel gelled up. I added 911 and the truck cleared up after about an hour. Now I have no high rpm power. I am using a bullydog and cts monitor. All the values look good I don't know what to check I just cleaned the egr this past summer and the ebp tube today. Could the fuel filters be bad or water in the hfcm? Any help is much appreciated.

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