Starts, runs and drives really well. Idle speed seems fine. The problems seem to start after its warmed up, the idle runs at ~1500, and the engine hesitates above ~ 3000 rpm. My plan is to test the throttle body position sensor and the fuel pressure. I started on the position sensor this morning and found that I have a 4-wire sensor, but the wiring diagrams I've been able to find reference a 3-wire sensor. https://wrangleryjforum.com/attachments/jeep-wrangler-yj-wiring-diagrams-pdf.115642/
So I guess its a 2-pot sensor and I'm reasonably sure that they are Black(GND), White/Black(Hot), Brown(Pot1) and Green/White(Pot2). But I'm struggling to get any voltage readings with a back probe from ground to either pot. I've removed and replaced the connector a couple of times to verify that I have good connection with the probes. I'm measuring with the key in the on position. I can't believe the sensor would be completely dead and the jeep would still start and run, so I have to believe I'm doing something wrong.
The jeep is new to me, I bought it maybe two months ago. I've replaced the master cylinder and some brake lines, and resolved some tail/tow electrical problems.
Anyway I'm going to go get a fuel pressure test kit and do that while I wait for someone here to hopefully illuminate me or at least tell me I'm on the wrong track.
