Replaced the fuel pump and both coils. A beautiful central Florida day yesterday yielded an opportunity for 100+ miles to go out and ride, play around and see what I could learn.I have another pump on the shelf, I’ll swap it out and see while I have the tank off. I originally thought the fuel pump as a culprit, but that’s the time the TPS went out... When I had the new pump in, the pressure regulator popped off inside the tank. I put the original pump back in as the TPS got replaced, and pressure tested the original pump to about 46 psi, the strong side of within spec. It’s free to swap the pump out again, so I’ll give it a try. 🙂
The problem remains unchanged.
I did notice it seems more likely to happen on a demanding downshift from 6th to 5th landing around 8k it will miss 5 or 6 times without a substantial loss of power. However.... it will pull from mid range or lower to redline without a noticeable miss.
I verified all my vacuum lines are in good condition while I had it apart. So I’m wondering if the one of CKP/CMP/IAP sensors could be the culprit as they play the primary role in modifying injection timing.