pue174 Posted August 28, 2014 Report Share Posted August 28, 2014 I have a 2011 with the FRPP 750 upgraded 2.9 whipple, I have noticed I am always at 15.2 volts. Does anyone know if this is normal for the 2.9 whipple tune? Any ufo would be great. The dealer wants to fix it but can't figure out why it is so high. They have put a new alternator in and checked all the wiring and it still is at 15.2 volts Link to comment Share on other sites More sharing options...
silly fast Posted August 28, 2014 Report Share Posted August 28, 2014 That is to high for any car. Even high output units only put out 13.5 volts. which is different than amps. Did they put a different gauge on the altinator? Your gauage may not be correct. A tune shouldn't have anything to do with the charging system. Link to comment Share on other sites More sharing options...
pue174 Posted August 29, 2014 Author Report Share Posted August 29, 2014 Yes on multiple gauges. Tried different alternator and checked all grounds. No changes. Link to comment Share on other sites More sharing options...
pue174 Posted August 31, 2014 Author Report Share Posted August 31, 2014 Any ideas why I am running at 15.2 volts? Anyone? Link to comment Share on other sites More sharing options...
pue174 Posted September 9, 2014 Author Report Share Posted September 9, 2014 An update for anyone that cares. Brand new alternator installed, still at 15.2 volts Ford is pretty sure its the pcm most likely the tune from the pro cal that came with the whipple upgrade They sent a data log to ford performance and we are waiting for them to look at it and diagnose Link to comment Share on other sites More sharing options...
shel-b001 Posted September 9, 2014 Report Share Posted September 9, 2014 Interesting keep us posted Link to comment Share on other sites More sharing options...
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