I havn't done a whole lot of tuning this year as my truck is running pretty well, but i noticed that my hpt scanner is only reading 98% tps when i'm at wot. This never happened until recently. Any ideas what could be wrong?

 

normal

 

even though in the past it had always showed to be 100% tps?

 

yea, I can't remember the exact theroy behind it, (reason for my short answer, lol) but I have seen it before with drive by wire set-ups....

 

ok, fair enough. But, let me ask you this,.....does that tps % directly correlate with tps voltage? For example, if my n20 controller was set to turn on at X voltage (100% tps) does that mean that it is now only seeing Y voltage (98% tps) therefore not activating my n20 noids?

 

yes it does directly correlate to a voltage. Your TPS nitrous switch should not be set to turn noids on at exactly 100% throttle/X voltage reading.IMHO

Should not be hard to check though, hook a meter to B+ or ground at your noids(which ever one you apply) and have a buddy press the go pedal to see if you are getting B+ or your ground