Pulling Fuel
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Senior User
Joined: Sep 2006
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From: Savannah
Pulling Fuel
as i understand it when you go over 15psi the computer pulls fuel. Does it do it by pulse width or by ICP pressure. I pulled my first heavy load this past week after total rebuild and new charger . It will go to 30 psi with EGT under 1300 after long hills but you can fill it pull fuel . I am thinking of adding the boost fool regulator but i have a 6 gun that mask that but it also mask the IPR ,the issue i see with that is that i have a terminator pump and it will call for even more oil . I have also seen a little issue with compressor surge untile i step in it then it runs toward 30 psi and then hear comes the fuel pull. any suggestion . I dont really want to do away from the 6 gun because it is a watch dog that pulls fuel while i am sleeping or not paying attention. any ideas on the regulator with the gun.... I have even considered 2 map sensors because the banks cant let the computor see more than 15psi .
Posting Guru
Joined: Jul 2008
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From: Dalton,Ga
what is your fuel pressure?? The map sensor tells the PCM when you reach appx 22psi of boost and the PCM defuels the truck and you should get the check engine light...if your tuner doesn't regulate the map, then you will need a boost fooler..Clay @ Riffraff has one, Its called an OCR...
here is the link
Riffraff Diesel: OCR - Overboost Code Regulator=
here is the link
Riffraff Diesel: OCR - Overboost Code Regulator=
Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
Asleep at the switch? I worried about that as well. I bought gauges with alarms and the little red light gets my undivided attention when it prairie-dogs. This would diminish the need for automatic defueling and make installing the OCR safer.
That being said, several thoughts popped up when I read your post:
That being said, several thoughts popped up when I read your post:
- You're getting 30 PSI and surging with a WW?
- EGTs nearing 1300?
- Defueling?
Thread Starter
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Senior User
Joined: Sep 2006
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From: Savannah
Asleep at the switch? I worried about that as well. I bought gauges with alarms and the little red light gets my undivided attention when it prairie-dogs. This would diminish the need for automatic defueling and make installing the OCR safer.
That being said, several thoughts popped up when I read your post:
That being said, several thoughts popped up when I read your post:
- You're getting 30 PSI and surging with a WW?
- EGTs nearing 1300?
- Defueling?
It's a Van Gogh
Joined: Feb 2010
Posts: 7,798
Likes: 1,331
From: Elk Grove, CA
The Banks 6 gun (still stacked with the Predator like in your sig?) is "canned" tunes designed to run on a stock motor. You have a few mods. A custom tune that takes your mods into account would work wonders.
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Senior User
Joined: Sep 2006
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From: Savannah
And yes i am looking into changing over to a custom DP chip . But money and dyno time or some typ of live tune..... I still wonder does the pcm pull fuel thru pulse width or icp pressure or drop cylinders to get it out of high boost pressure ......
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Hotshot
Joined: Jan 2011
Posts: 18,849
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From: Puget Sound
ICP can absolutely go nuts. I had tired injectors that bled oil and going from an old tired pump to the T500 bumped my ICP 700 PSI. I won't even go into what happened when I swapped to single-shot injectors with a T500. Suffice to say I want my ICP reported accurately to the PCM and the tuner. I'm still dialing my truck in, so I don't have hard numbers to exchange. AE is saving my bacon from being overly crispy.
Fueling is a combination of things: ICP rise/fall, ICP PSI, injection start timing, and pulsewidth. The PCM or tuner has only so much room to play with because of the split injectors - they are slow to really start and a long pulsewidth causes high EGTs. Tricking the ICP reading really buggers up the plan. A tuner that sees the true sensor readings and fuels accordingly is better than "lying" to a stock PCM with custom parts.
Fueling is a combination of things: ICP rise/fall, ICP PSI, injection start timing, and pulsewidth. The PCM or tuner has only so much room to play with because of the split injectors - they are slow to really start and a long pulsewidth causes high EGTs. Tricking the ICP reading really buggers up the plan. A tuner that sees the true sensor readings and fuels accordingly is better than "lying" to a stock PCM with custom parts.
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Postmaster
Joined: Jul 2006
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From: Bend, OR
yes they are stacked But as i understand it the 6 gun changes ICP and fools the PCM as to tell it the boost is lower . I am just a bit worried if the ICP would get get out of hand because the terminator pump will go higher than the stock ( the way i understood it )...
And yes i am looking into changing over to a custom DP chip . But money and dyno time or some typ of live tune..... I still wonder does the pcm pull fuel thru pulse width or icp pressure or drop cylinders to get it out of high boost pressure ......
And yes i am looking into changing over to a custom DP chip . But money and dyno time or some typ of live tune..... I still wonder does the pcm pull fuel thru pulse width or icp pressure or drop cylinders to get it out of high boost pressure ......
The preditor is junk as well, just a flash tuner with canned junk tunes.
You dont even know that your PCM is pulling back fuel, which is done with ICP. You could have your wastegate opening, you could have low fuel pressure...
Get yourself some stand alone gauges, dump the junk Banks crap and move on.
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From: Savannah
That what I will get the 6 gun has a pyro on it and that's what I use now
Postmaster
Joined: Apr 2012
Posts: 2,613
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From: North Georgia
1300*?
You got problems... and i think they are spelled b.a.n.k.s.
Get a dedicated pyro on you rig.
Trash can the canned trash. Before it trashes your truck.
Why did you bore .030+ ?
Does your canned tuning compensate for the extra space? I doubt it.
Your pcm doesnt know your cylinders are opened up. More air and same amount of fuel should logically make for a leaner mix... i.e. hotter egt's.
Can you get some live data?
Xtof
You got problems... and i think they are spelled b.a.n.k.s.
Get a dedicated pyro on you rig.
Trash can the canned trash. Before it trashes your truck.
Why did you bore .030+ ?
Does your canned tuning compensate for the extra space? I doubt it.
Your pcm doesnt know your cylinders are opened up. More air and same amount of fuel should logically make for a leaner mix... i.e. hotter egt's.
Can you get some live data?
Xtof
Posting Guru
Joined: Dec 2007
Posts: 2,290
Likes: 2
From: SEMO
Gearhead Automotive Performance
http://swampsdiesel.com/files/ChipProgramInfo.pdf
F5 1-16 Position Switch on the fly Chip - Featured Products
Start reading on aftermarket Turners! These are just a few.
http://swampsdiesel.com/files/ChipProgramInfo.pdf
F5 1-16 Position Switch on the fly Chip - Featured Products
Start reading on aftermarket Turners! These are just a few.