I recently started driving 95 GT (auto) more often and I notice some surging during most driving condition, and during acceleration, I can hear a significant amount of spark knock too. It does have the surging idle issue going on as well. I have dropped the timing down to 10BTDC, I've also tried as much as 14BTDC- which didn't help, so it's back down to 10BTDC. I've noticed that the dizzy is a little tight when I try to move it around trying to adjust timing. I've cleaned the MAF, checked FP and did plugs and wires, also a coolant temp sensor. No CEL or codes yet.