I guess I would start with fuel delivery if you changed that filter too maybe. Look above the pass ft tire, you'll see a 3/8" metal tube, against the motor that ends there, it's the drain for the bowl (yellow lever you slide to the side). Get a cup, open the lever, drain the fuel bowl, look at the fuel, close the lever. Then, turn the key to the ON position (should hear the pump) for 15 secs. Drain the fuel bowl again, whaddya got?
It's also a good idea to go THOROUGHLY thru the fusebox.
BUT, for the most part, the days of "well,,, it's gotta have something to do with the XXX
system" are pretty much gone. Today it's all about "1's & 0's" flowing thru the PCM, and, I'm afraid that's where we've all gotten accustomed to going next
It's time to get it on a diagnostic tool (professional scanner) and monitor what's going on.
Is the PCM seeing a TPS change?
What do the sensors see from the HiPres oil system?
That kind of stuff...