I did the search. got myself this far, and I am no PHD degree holding electrician but what's going on here? I tried all the switch on fuse slots in the SJB. I double checked all my wire to wire connections.
POWER
GROUNDS
I don't own a gt500, BUT! I was able to put one of these bad boys on my 07 saleen! :biggrin: Slight mods to the H/E but well it fits..
Needless to say, fans won't fit.
Spray a very small amount of pb blaster, and to get a better hug on plug with the socket I put some plastic wrapping between the 2. Very Brute like but I dunno it worked when I changed my sparks.
Though it may not be the budget friendly way, try a different tuner at least then for sure you'd know if it's the tuner or car that's cause your power loss.
I think the elephant in this thread is your tires dude, i have a saleen supercharged with a 3.75 pulley O/R xpipe, jlt CAI, 4.10 gears. BMR LCA. and 305/45/18 nitto 555rs. my slowest 1/8th of the night was 8.5