Engine Missing ( Help)
 

I just put in my 4:10 gears and love the power while testing it out my engine starts to miss & buck. My dash flashes SYS, Speedo goes to zero, & security light flashes then car runs fine for a 20 –30 mins then same thing, it also throws an service ASR code. The air conditioner also stops working and throws a flash code when I restart. Any suggestions

92 ZR1

Brett K