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Another 5.4 question?

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Old Jan 1, 2013 | 04:47 AM
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Another 5.4 question?
Does the 5.4 rev limit at 2750rpm when in park or neutral or do they only have a sensor that limits revs when it's cold out? I only drive my truck about 5 days a month and whenever I start it in -40c after 24 days, it limits my revs. It starts fine and drives normally in 2wd and 4wd low and high.
 
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Old Jan 1, 2013 | 05:33 AM
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I'm not sure, but giving more info on the "truck" year etc, may help others
to dig for the info.
 
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Old Jan 1, 2013 | 07:44 AM
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ken kenmnedy
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I belive all ford autos are rev limeted in park and nute. to keep from slaming the trans in gear at to high rpm and breaking stuff
 
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Old Jan 1, 2013 | 08:52 AM
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Why exactly are you trying to rev a cold engine anyway? There is no faster way to destroy an engine than to run the RPMs up immediately after starting a cold engine. This effect is magnified when it's that cold out!
 
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Old Jan 1, 2013 | 08:27 PM
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well if its a 99-04 5.4 you can rev it too 6k limit unless you have a aftermarket tuner that you can adjust the P and N revs???
 
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Old Jan 1, 2013 | 08:40 PM
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From: laporte in
If its a 3v 5.4(05+) the stock mapping doesn't let it rev up for whatever reason.
 
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Old Jan 1, 2013 | 08:42 PM
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and who revs their motor to the limit anyways? what are you 16 and in high school.....
 
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Old Jan 1, 2013 | 08:47 PM
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Exhaust video for YouTube
 
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Old Jan 1, 2013 | 08:49 PM
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Originally Posted by Nickf1989
Does the 5.4 rev limit at 2750rpm when in park or neutral or do they only have a sensor that limits revs when it's cold out? I only drive my truck about 5 days a month and whenever I start it in -40c after 24 days, it limits my revs. It starts fine and drives normally in 2wd and 4wd low and high.
Yes, the revs are limited in P or N. Also, please be careful revving the engine, at least until the oil warms up. The 3v 5.4L has cam phasers, which use oil pressure. When the oil is cold they are locked at full cam retard.
 
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Old Jan 1, 2013 | 08:53 PM
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Originally Posted by SuperDutyScaler
and who revs their motor to the limit anyways?
I do, but typically in drive rather than park or neutral. And never until it's warmed up!

Originally Posted by SuperDutyScaler
what are you 16 and in high school.....
Is that really necessary?
 
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