Originally Posted by
ud03803
Curious if anyone else has experienced this one. This started happening before my recent switch to E85 and a tune so I am sure it isn't that. The car was totally stock. After about 10,000 miles when it does a 1-2 shift or a 2-3 shift near red line but before fuel cutoff, it's like it loses a little power, shifts then picks right back up. It happens really quick but you can definitely feel it. Prior to that, the transition in power from one gear to the next was butter-smooth. It can be described as a "blurp" maybe. After tuning and E85, it still does it. I thought about valve float but I can't imagine a stock engine and cam doing that. I also considered spark plug flame out or ignition coils. I am at a loss. No engine codes are set. I would appreciate any insight.