Decel tune on dp tuner - Ford Powerstroke Diesel Forum
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Old 06-10-2012, 08:10 PM
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Decel tune on dp tuner

So I installed a dp tuner with the decel tune. I love the tunes but on the decel tune I dont notice that much difference when activating it. I have not used it pulling a heavy load yet, just a small two atv trailer. I checked EBVP and it's getting power, how else to I check to see if it's closing?


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Old 06-10-2012, 10:52 PM
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You could pull the down pipe off, start up the truck and put 12v to the EBPV. You could also wire in a 12v light to see when it activates, it should make a noticable hissing sound when it is closed. I run mine on a switch manually so I don't know what the requirements are for the tune to close the valve.
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Old 06-11-2012, 04:53 AM
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Does it make a bigger difference when your loaded verses empty?


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Old 06-11-2012, 11:21 PM
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Well, it only provides so much backpressure so more weight will push you more. You do need to have your RPM's up, it is basically useless below 2k.
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Old 06-12-2012, 04:45 AM
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Ok that's what I was wondering. Last night I was listening to the exhaust at the tailpipe and I can hear a different sound when it's turned to the decel tune. So I am guessing that its working.


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Old 06-12-2012, 10:00 AM
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Not worth anything below 2000-2200 RPM's... Its just a little exhaust brake, not going to chirp the tires or anything.
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Old 06-12-2012, 10:20 AM
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I guess I was not getting the rpm's up high enough. Thanks for the help


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Old 06-12-2012, 06:46 PM
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Quote:
Originally Posted by JSchuricht View Post
You could pull the down pipe off, start up the truck and put 12v to the EBPV. You could also wire in a 12v light to see when it activates, it should make a noticable hissing sound when it is closed. I run mine on a switch manually so I don't know what the requirements are for the tune to close the valve.
Never thought about running it on a switch
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Old 06-13-2012, 09:32 AM
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Might want to read this...


First, in order to transfer the energy of the moving vehicle to the engine during deceleration, two things must occur: the torque converter must remain locked, and the coast clutch must be engaged. The problem with this is that the coast clutch on a stock transmission only has 3 friction plates, and these are smaller than the standard forward clutches. On 2001 and later transmissions, you also run the possibility of damaging the intermediate sprag or "diode," which will result in an immediate transmission teardown. Again, lightly loaded vehicles would have less of a problem with this, but the general idea of an exhaust brake is to be able to slow larger loads without overheating the standard brake system. It is these types of loads that can cause transmission damage.
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Old 06-13-2012, 10:38 AM
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How do I know if the trans is a 2001 or later. It's a reman from ford that was put in back in 2006. Plus I did not know there were differences in the 4r100's.


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