Sorry if this is the wrong section for this but here goes.
So recently Penny has been doing something weird and not often but it still worries me. In first gear at WOT between 4 and 5.5k RPM, she kinda jitters. Like if someone was going between full and 90% throttle kinda fast.
This past Saturday on a road trip she also gave me a service engine light when I went to pass a truck on the highway. Immediately following, her RPM's stayed above 2k for about 30 seconds. I was going 60 MPH.
Any help would be kindly appreciated. I've had my PCS starting to act up in the middle of last month and I have a shift kit on the way hoping to remedy this problem.