4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

rev limiter

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Old Nov 7, 2009
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trail ranger's Avatar
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rev limiter

why does my truck only let me rev it to 3200 ? extremely annoying. there is no way to change this is there?
 
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Old Nov 7, 2009
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if you put it in drive you can rev it much higher
 
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Old Nov 7, 2009
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i was wondering the same, but only for reverse.....hard to rock out of a hole when you cant get the tires moving
 
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Old Nov 7, 2009
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Ford must know something about these engines that we don't. These engines prolly are too much to handle so they had to put a limit somewhere so normal humans can handle it.

EDIT: (sarcasm)
 
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Old Nov 7, 2009
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haha well yea if im floorin it or kickin up some mud it revs quite nice but i dont like how i cant rev it up in neutral
 
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Old Nov 7, 2009
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its to keep you from doing that lol
 
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Old Nov 8, 2009
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its a rev limiter to stop people from revving the **** out of them. can be taken off with any hand held tuner, same with the 93-95mph top speed limiter.
 
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Old Nov 8, 2009
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Get a tuner
 
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Old Nov 8, 2009
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i know it may sound wierd and i dont know what exactly happed but i got burried in the sand yesterday and tried to rock out and when the tires started spinning in reverse it bounced off the rev like 3200 i guess and stalled and its an automatic lol i didnt think it was posible to stall an automatic.
 
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Old Nov 8, 2009
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automatic transmissions limit reverse to 3200 rpm?

damn, back i my standard transmission days i would rip backwards at over 5k
 
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Old Nov 8, 2009
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Originally Posted by Spc_Austin
i know it may sound wierd and i dont know what exactly happed but i got burried in the sand yesterday and tried to rock out and when the tires started spinning in reverse it bounced off the rev like 3200 i guess and stalled and its an automatic lol i didnt think it was posible to stall an automatic.

i know that if the truck rolled forward at all while in reverse the truck will automatically shut off.
 
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Old Nov 9, 2009
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This is why i have a manual trans :)
 
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Old Jan 12, 2010
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Originally Posted by 04DSGMike
its a rev limiter to stop people from revving the **** out of them. can be taken off with any hand held tuner, same with the 93-95mph top speed limiter.
How would i do that? i have a sct tuner from bama chips.
 
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Old Jan 12, 2010
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I've been curious about this one. M truck doesn't have a rev limiter even though it's an auto. Everything on it is stock. But it rev's all the way up to 5k
 
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Old Jan 12, 2010
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maybe they didnt limit the OHV 4.0's. who knows
 
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Old Jan 12, 2010
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Originally Posted by Igobytwitch
I've been curious about this one. M truck doesn't have a rev limiter even though it's an auto. Everything on it is stock. But it rev's all the way up to 5k
Does it go past it? Usually rev limiters are a little higher than the top of the RPM scale. I'm 99% sure you truck has one. They have been using limiters since the early years of EFI. Why? Because EFI systems will continue to supply fuel to the engine at mostly whatever RPM the engine will rev to before falling apart so there has to be an ignition cut or fuel cut to prevent over revving. Even stock carbed engines had a limiter, sort of. It was more like the carb would reach its maximum fuel flow capability.
 

Last edited by whippersnapper02; Jan 12, 2010 at 11:04 AM.
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Old Jan 12, 2010
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my 98 ranger didnt have one but my 01 does. mine doesnt have it while in reverse just nuetral
 
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Old Jan 12, 2010
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Every single vehicle built within the last 25 years or so has some kind of engine speed limiter from the factory.....every last one of them. Put the trans into 1 and punch it till it pings the limiter. Unless someone went in with a tuner and defeated it, there's a limiter.
 
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Old Jan 12, 2010
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Is there a way to adjust the rev limiters?

Or are they permanently set based on the engine?
 
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Old Jan 12, 2010
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You can change yours with a tuner. No point since there isn't any power up there and the risk of hurting your engine.
 
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Old Jan 12, 2010
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With an SCT tuner, when loading a tune, choose adjust options, and there you have the park/drive RPM limit setting. But why would you want to rev the **** out of it in neutral? Thats not good for the motor.
 
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Old Jan 13, 2010
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I was just curious, I've been told before that removing the rev limiter will mess up your shift timing if you have an automatic.

But I guess that tuner lets you adjust certain rev limiters
 
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Old Jan 13, 2010
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i dont have one
 
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Old Jan 13, 2010
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Originally Posted by 01RangerEdge
I was just curious, I've been told before that removing the rev limiter will mess up your shift timing if you have an automatic.
Nothing to do with shift timing and everything to do with exceeding the mechanical capabilites of the engine.
 
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Old Jan 13, 2010
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Originally Posted by bergs
Nothing to do with shift timing and everything to do with exceeding the mechanical capabilites of the engine.
KABOOM
 
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