Overboost Question - Ford Powerstroke Diesel Forum
 
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post #1 of 7 Old 01-08-2011, 05:05 PM Thread Starter
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Overboost Question

Hi everyone, I just recently installed a banks wastegate actuator and I am seeing some interesting behavior. The first time I floored it, after install, my boost jumped up to 25psi for a few moments and then I felt the truck suddenly loose power and the boost fell back to ~17 psi. From there on it seemed to maintain that level of power for the rest of the climb. I pulled over and noticed some soot around the exhaust housing on my turbo. So I wrote the problem off as causing a new turbo exhaust leak from the increased drive pressure.

This happened in the process of a series of upgrades I was performing over christmas break. I have since installed stage I injectors and an adrenaline injector pump. What is weird is that it can now easily maintain 25psi of boost but it still has that power loss after a few seconds. With the new hpop I am maintaining a constant 3200psi at WOT, so I am not feeling the loss due to injector pressure that I used to.

Granted I still need to fix the new turbo exhaust leak and the up-pipe leak I discovered in this process, but could the ecu be cutting fuel due to the higher boost pressures? The SES light is not coming on. Any other thoughts?

Thanks,
Dustin

Early '99 F-350
- AFE Stage II Intake
- 4" MBRP Stainless Exhaust
- Banks Big Head Wastegate Actuator
- DP Tuner (stock, 40 tow, 60 econ, 80 econ, 120 race)
- Adrenaline HPOP
- Swamps Stage I Injectors
- South Bend Organic Single Plate Clutch
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post #2 of 7 Old 01-08-2011, 10:28 PM
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Do you have a boost relife valve inline with your MAP sensor? This could be your problem.

This is what I am talking about.
http://www.dieselsite.com/index.asp?...PROD&ProdID=31

02 crewcab Lariat 4x4 7.3l PSD
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post #3 of 7 Old 01-08-2011, 11:49 PM
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you have to have a boost fooler/boost annihilator on it. once the computer sees over 17 PSI, it defuels.

Order one from ITP/Sinsiter diesel.

Nick
E99/CC/Lariat/Factory Wide Body Kit
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D66 w/Dieselsite WW2, Full Force 250/100s, Adrenalin HPOP, Built Trans, Walbro Fuel Pump, S&B Intake, 6" Stacks, Leveling Kit, Eagle Alloy Wheels, 315/75/16 Grabber AT2s & Much More




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post #4 of 7 Old 01-09-2011, 03:01 AM Thread Starter
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Great! That is what I was hoping for. The kit on sinister diesel says that it is set at 21 to 22 lbs of boost. Should I adjust it down to 17 psi?

Early '99 F-350
- AFE Stage II Intake
- 4" MBRP Stainless Exhaust
- Banks Big Head Wastegate Actuator
- DP Tuner (stock, 40 tow, 60 econ, 80 econ, 120 race)
- Adrenaline HPOP
- Swamps Stage I Injectors
- South Bend Organic Single Plate Clutch

Last edited by crf250guy; 01-09-2011 at 03:23 AM.
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post #5 of 7 Old 01-09-2011, 09:23 AM
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No, it will be fine at the preset value.

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post #6 of 7 Old 01-09-2011, 12:58 PM Thread Starter
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Fine or delivering maximum fuel? Thanks!

Early '99 F-350
- AFE Stage II Intake
- 4" MBRP Stainless Exhaust
- Banks Big Head Wastegate Actuator
- DP Tuner (stock, 40 tow, 60 econ, 80 econ, 120 race)
- Adrenaline HPOP
- Swamps Stage I Injectors
- South Bend Organic Single Plate Clutch
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post #7 of 7 Old 01-09-2011, 01:38 PM
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It won't defuel until around 22psi is reached. If you set it lower, your truck will think you have less air and retard the fuel to match.

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