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post #1 of 6 Old 07-23-2013, 08:50 AM Thread Starter
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Irratic Turbo PSI

I have a 2013 F250 I bought a few months ago. I have an H&S Mini Maxx w/ DPF delte, Flo Pro 5" exhaust and a S&B CAI.
I put all this on at the same time at 1000 miles. I now have 9500 on it.

The issue I am having is after the truck is warm and has been running a while when I come to a stop...sometimes when I take back off I have 0 turbo pressure. If I accelerate hard the turbo spools up and drops back down to 0. It will do this a couple times and then it keeps pressure like it should. It does it off and on.

Anyone else seen that happen? I have talked to H&S about it and they said they have not heard of that problem.

I was hoping someone else has seen this and might know what it is if anything.

I appreciate the help.
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post #2 of 6 Old 07-23-2013, 03:16 PM
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I have had the same issue while out running over 80 mph on the interstate, boost will drop to zero, EGTs will go as high as 1300*, I have only noticed it cruise on. After the truck needs more power for a hill or something, the turbo will surge to 15-20 psi. Doesn't do anything when not on cruise control however.

'13 F250 CCSB Black/Black: Carli Starter & Stabilizer, Minimaxx, S&B intake, 5" FloPro, egr blocker, BMF Rehabs, Toyo AT IIs, Titan 50gl Tank, Amp steps, Blacked Out Tails/3rd/Markers, Full Custom Sound
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post #3 of 6 Old 09-10-2013, 07:12 AM
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I had this problem on my 6.4...ended up being the map sensor.

2011 F350 King Ranch DRW, Leveled, Hid's,Bone stock scorpion for now!
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post #4 of 6 Old 09-10-2013, 07:40 AM Thread Starter
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Problem was fixed when I unplugged the orange connector on the butterfly valve right in front of the fan. I already had the orange EGR connector unplugged on the passenger side.
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post #5 of 6 Old 09-20-2013, 02:13 PM
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what does that plug go to?
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post #6 of 6 Old 09-21-2013, 05:25 AM
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Is the 0 psi reading on the Mini Maxx, Dash or both?

13 F250 Lariat CC SB 3.31 EL axle w/SPE full lock module, Ultimate Interior,
H&S Big Single 64mm NON VGT Turbo Kit, Cast manifolds, NON Cobra downpipe, Mini MAxx w/H&S stock fuel tune
Down Pipe back 304T 4" Diamond Eye, AFE stage II intake, front 4 link,
Road Armor bumpers front/rear. N Fab nerf steps. 20" American Force w/Trxus 33",
Dura flaps, Air Lift rear bags, 34k+ miles, Stage 3 traction block bars.


2012 F250 TOTALED.

Civilian Contractor Airforce 2+ years Asscrackistan.
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