Diablo Chip in 00 GT

[stangt00]

How many people are using or have used the Diablo Sport chip on theyre 4.6's? I just recently add the Mac Prochamber, offroad, to mine and it's a dog now. I took the chip out and it ran better. Anyone else have any pro's or con's with the diablo? The car ran great before the the prochamber. Took a SVT lightning with it (he sold it after that ) at the track running 13.27 @ 102. Anyways, strange thing is, after installing the prochamber (no cats) I never got a check engine light. Thought it was strange since I drove it for 50 miles and still nothing. So I disconnected the plugs to the O2's, no change in performance, no check engine light. Hmm. Took the Diablo chip out, still no check engine light. Each time I changed something, I reset the computer and ran the car. Not even a DTC ( diagnostic trouble code) came up with O2's unplugged. I put he chip back in and it actually seemed to run better than it did initially with the Prochamber. Does anyone have any input, ideas or whatever in this particular problem. Any comments on the Diablo chips themselves? The chip was custom Dyno tuned and with all the mods b4 the Prochamber I got 264 RWHP and 289 RWT.