OVERBOOSTING WITH NEW SCT LIVEWIRE - Ford Powerstroke Diesel Forum
6.4L Performance Parts Discussion What has or has not worked for you?

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Old 10-25-2013, 07:03 PM
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OVERBOOSTING WITH NEW SCT LIVEWIRE

Hi guys I think I may need some help....

I have a 2008 6.4 PSD

It has been stock up until this past week.

I installed an SCT LIVEWIRE with AFE 4" DOWNPIPE BACK EXHAUST. There are five custom tune levels supporting DPF/CAT delete. Also EGR is disabled.

While running tune three which is supposed to be dyno'd at 401hp/778lbft @ Rear wheel, I experienced a DTC 2263 with moderately hard throttle.

I began keeping an eye on boost and I was boosting to 40 PSI and above with 33-40 percent throttle accelerating up a mild grade. Also, experiencing same with a passing situation on interstate in which I felt was 'normal' everday encounter.

I cleared DTC and began to watch the guages. My MAP was 14 PSI and EBP was 52.79 PSI KOEO. I thought I had a bad EBP SENSOR AND TUBE and replaced both. However, this did not change the readings.

BTW the mileage was impressive 17/22.

I switched to tune 2 which was a step down from the above tune. It did not overboost, but does hug 40 PSI on a hard acceleration, bad thing though is mileage is not the best 14/17.

If it matters, I still have the stock air filter.

So...... My question is, 1) why am I overboosting??? I want to run this tu e because the mileage is great!

2) is it Okay to boost over 40 PSI???

3) won't it be worse with towing?
Any help is appreciated!!!!
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Old 10-25-2013, 07:14 PM
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Who's tunes are you running? That might be a helpful start.... & if I recall correctly I don't think the SCT shows EBP in PSI.

Last edited by lildevil02; 10-25-2013 at 07:20 PM.
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Old 10-25-2013, 07:23 PM
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I got the tunes from Mike at Punch It Performance. Yes the SCT Livewire reads in PSI if you set it that way.
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Old 10-25-2013, 11:08 PM
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Usually that code relates to ebp but you changed it. It wouldn't hurt to change map sensor. Going over 40psi won't cause that code.
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Old 10-26-2013, 12:54 PM
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What is the highest boost that I am safe at? I don't have a defuel option.
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Old 10-27-2013, 03:27 PM
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I have never seen a livewire measure in psi on the EBP. EBP is KPa, FRP is Mpa, and boost is in PSI. If you have some kind of trick up your sleeve to change them to read in standard units let us know because even SCT doesn't know how to

On boost that question cant really be determined. There are plenty of people that have run low 50s but most try to stay under 50psi
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Old 10-27-2013, 06:49 PM
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To change UNITS and MIN/MAX readings(units) on the guage, you just double click the guage on the screen then it switches you to another screen which allows you to change parameters/units.

I'm having issues though. My boost pressure in PSI on the guage doesn't correlate to my trucks built in guage. If I measure turbo boost in KPa it does though. I know it doesn't make any sense because 1 PSI = 6.89 KPa. It may be a fault in the unit - who knows but at least it works!
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Old 10-30-2013, 07:36 PM
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I have a LiveWire too and have never boosted over 30psi...even on the extreme tune and a hard accel.
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Old 10-31-2013, 02:18 PM
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Quote:
Originally Posted by matted2thefloor View Post
I have a LiveWire too and have never boosted over 30psi...even on the extreme tune and a hard accel.
On a wide open throttle run? Something is wrong with your tune/truck
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Old 10-31-2013, 06:59 PM
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You need a custom tune to work with the newer Ford Flash that's on your truck. The pre-programmed tunes or a custom tune without the proper changes will throw an overboost code. It's not as much the WOT boost, as part throttle. There are very strict limiters on boost and fueling with the later Ford Flashes, they were released July of last year.
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