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27th February 2017, 04:19 PM
#1
An easy way to be rid of those annoying 3Ltr limp mode issues forever.
Thought this would be good for all the 3ltr owners who have had a gut full of limp mode. I know I did back in the day. Plug and pray and just clip the voltage on the maf signals using this device and enjoy your new freedom of raising your boost levels without looking the limp mode issues. I don't know much about them, I just know plenty of people have used them. Other than making your own up from Jaycar, or using the HPD maf housing, which suits the Di'd only, this is another way to go.
http://www.14point7.com/products/ult...uel-controller
Last edited by mudski; 27th February 2017 at 04:44 PM.
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The Following 4 Users Say Thank You to mudski For This Useful Post:
AB (27th February 2017), growler2058 (27th February 2017), Hodge (27th February 2017), mudnut (27th February 2017)
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27th February 2017 04:19 PM
# ADS
Circuit advertisement
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27th February 2017, 07:24 PM
#2
Advanced
Originally Posted by
mudski
Thought this would be good for all the 3ltr owners who have had a gut full of limp mode. I know I did back in the day. Plug and pray and just clip the voltage on the maf signals using this device and enjoy your new freedom of raising your boost levels without looking the limp mode issues. I don't know much about them, I just know plenty of people have used them. Other than making your own up from Jaycar, or using the HPD maf housing, which suits the Di'd only, this is another way to go.
http://www.14point7.com/products/ult...uel-controller
Just out of curiosity mudski, what sort of max boost levels would bring on the limp mode?
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27th February 2017, 07:29 PM
#3
It varies between vehicle but its usually around 16psi for the Di motors and maybe around 18psi for the CRD's.
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The Following 2 Users Say Thank You to mudski For This Useful Post:
growler2058 (27th February 2017), Wilburnator (27th February 2017)
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27th February 2017, 07:36 PM
#4
Advanced
Originally Posted by
mudski
It varies between vehicle but its usually around 16psi for the Di motors and maybe around 18psi for the CRD's.
Is it a fairly quick response, as in hits the high boost and goes straight into limp? or does it have be in that range of boost for a given time?
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27th February 2017, 07:56 PM
#5
Downloaded manual and had quick look. Aimed at petrol engines, uses ignition coil pulse for rpm input.
Sent from my SM-T355Y using Tapatalk
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27th February 2017, 10:19 PM
#6
Originally Posted by
Wilburnator
Is it a fairly quick response, as in hits the high boost and goes straight into limp? or does it have be in that range of boost for a given time?
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I can't remember exactly but I think its 2 second or so before it hits limp mode.
Originally Posted by
Turtle_au
Downloaded manual and had quick look. Aimed at petrol engines, uses ignition coil pulse for rpm input.
Sent from my SM-T355Y using Tapatalk
There must be different models as I do know that this is being used for the Patrols. I'm crap when it comes to deciphering this electrical stuff. But I dont think they are using the rpm side of it. Just accessing the maf voltage signals.
https://cdn.shopify.com/s/files/1/01...anual.pdf?1955
http://www.14point7.com/pages/softwa...-documentation
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27th February 2017, 10:37 PM
#7
Patrol God
They are also starting to do some nifty things with ecu remaps.
Be aware that at this point not all di ecus are able to be remapped.
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27th February 2017, 10:37 PM
#8
Upon more searching around I see the boys on P4x4 have a thread about it...
http://www.patrol4x4.com/forum/nissa...thread-335202/
Interesting stuff.
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27th February 2017, 10:55 PM
#9
It has its own table that takes the MAF signal and rpm then from the table sends the new MAF signal to the ECU. If the aim is to limit the MAF voltage to stop it triggering limp mode, a simple zener diode on the MAF sensor line would do the same thing.
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28th February 2017, 10:20 AM
#10
Originally Posted by
Turtle_au
It has its own table that takes the MAF signal and rpm then from the table sends the new MAF signal to the ECU. If the aim is to limit the MAF voltage to stop it triggering limp mode, a simple zener diode on the MAF sensor line would do the same thing.
Sent from my SM-T355Y using Tapatalk
Yeah I spoke with a chap a few weeks ago who has done this. A simple inline resistor or diode, and his limp mode issues were gone. I'm no expert though, but the MAF is there to assist control of air fuel ratio's, so just adding a diode, I don't know how it would affect the AFR's across the rev range. Might be nothing, not sure...
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