ok so I'm cruising on the parkway at 65 mph. So I decide to get on it at half throttle. Around 14-15 lbs. I feel the car slow down and it felt jerky at the same time. That sucks! Whats causing that? I know it can't be the alky flooding the spark because I'm not spraying that much. Would the car be surging or bucking? How do I know the car is bucking or surging? While the car felt like it was losing power and jerky at the same time, I heard a screeching sound, like a screaming banshee on the driver side and thats when the knock detector lit up and I let off immediately. All of this happens in 4th gear only. Whats causing the power loss and screeching sound? dunno What should I check?