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6.0L Power Stroke Diesel 2003 - 2007 F250, F350 pickup and F350+ Cab Chassis, 2003 - 2005 Excursion and 2003 - 2009 van

Weird Boost readings?

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Old Sep 16, 2013 | 08:25 AM
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Weird Boost readings?

I dont know if the new tune is making the scan gauge II act up, or if I have a sensor going.
Before tune, BST reading worked fine, followed the dash somewhat.
After tune, at idle BST is -.3 and when hammered, never goes over 13. Well, it does, but it goes to a negative number, then goes back to a "normal" number.
Do I need to change the Scan Gauge II to the other BST pid, or do I have a bad sensor?
 
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Old Sep 16, 2013 | 08:27 AM
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Take the tune back to stock and see if it acts "normal". Tuners sometimes manipulate the MAP/Boost parameters to get more boost because the PCM limits that.
 
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