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6.0 Powerstroke No Rev Limiter

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#6.0powerstroke #programming #revlimiter
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2.2K views 6 replies 3 participants last post by  Zp67  
Z
#1 ·
First post so pardon if I step on any moderator toes. Just haven't found much about this issue here or anywhere else.

Early model 2004 6.0 psd. 220k Miles. Mainly stock aside from a blue spring, WW, and straight pipe. Tuner for monitoring, but still run a stock tune. (Tuner was not installed at the time of this issue though)

Noticed I had my rev limiter before performing a bit of work. It would hit in the normal range about 4100 or so.
I changed injectors (all 8 with stock motorcraft) and used forscan (all I had at the time) To reset pcm adaptations since the injectors were new.
Truck runs fine. No issues whatsoever but I noticed my rev limiter is gone. Took me a while to notice since I don't drive it rough.

Is this a programming issue? Did I unintentionally delete it when I reset adaptations? Is this something Ford could reprogram? Doesn't cause any issues since I try to keep my rpms in a moderate range, but I just have to be mindful that it won't hit the limiter if I do get there.

Thanks for any help and advice. I appreciate it.
 
#3 ·
how did you determine the rev limit is "gone"?
nothing you did should have removed the factory rev limit ( can't remember the exact rpm 41-4300 rpm

the stock rev limit will pull fuel but it can not stop a downhill over rev
 
Z
#6 ·
ZMANN said:
how did you determine the rev limit is "gone"?
nothing you did should have removed the factory rev limit ( can't remember the exact rpm 41-4300 rpm

the stock rev limit will pull fuel but it can not stop a downhill over rev
Click to expand...
While revving in park or neutral beforehand it would easily it the limiter. Now it doesn't. Neutral rev will keep climbing until you let off.
 
B
#5 ·
Possibility of engine damage starts to go way up at 4200 rpm. There is something not being told to us if someone is going even to 4000 rpm (which is Ford's "defuel" point)!!
 
Z
#7 ·
Not sure what else I could tell. Truck is my daily, and I try to take care of it. I'm the second owner and the first took flawless care of the truck. It was absolutely bone stock when I got it and I haven't done much to change it from that. No codes (aside from egr lol) and no tunes put on it.
I know before the issue, it would hit the rev limiter easily while in neutral or park.
If I do the same now, pedal to the floor it will not hit it. I haven't tried to push my luck because I'm scared of damaging something tbh, but it is definitely not there, or if so it somehow is set way higher than it was before.
Thanks for the feedback guys
 
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