Cranks but no start

I recently purchased this car it is the SVT. it ran great I noticed a white wire hanging from under the glove box I tried to tuck it under the carpet and when I did it pulled out of the computer. it was a three stage aftermarket chip Diablo brand. the car was running at the time twenty seconds later it turned off. I reinstalled the chip cranks but will not fire. I reset it without the chip same result and the ob2 will not connect to vehicle. is this a computer problem or a pats problem? thanks