Exhaust or catalyst blockage? Can you repeat issue with shifter in manual low gear like Low or second above 3000rpm. Then you don't have to be going highway speed to investigate anything. Also check fuel pressure. The fuel demands at idle and low load are much less so a blockage or fuel pump failing will only show at higher rpm and higher load. Blockage can also be rust in the bottom of the fuel tank plugging up the fuel pump inlet sock. Either way, hook up a fuel pressure gauge, feed the hose around the hood hinge, and tape it to the windshield. Measuring exhaust back pressure can be done in the driveway. The kits usually have adapters to replace the oxygen sensor. Then just throttle the engine through the RPM range and look at back pressure. It should be less than 3psi at 2500rpm. Sometimes you can also tell exhaust restriction with a vacuum gauge on the intake manifold. At 2500rpm and neutral, it should be about 3 in. Hg different than idle vacuum. If it is like 8-10 in. Hg, then there could be an exhaust restriction causing engine to work harder.
The data at 3100 rpm and 97 kPa MAP just shows that you are wide open throttle. The short term and long term numbers are 0 because it is most likely open loop fuel control. That doesn't really give us any information. I would not worry about the connector as Toyota only makes one harness and they tape back connectors not needed. Like it could be for a different emissions package or accessory or even for a manual transmission application.
The data at 3100 rpm and 97 kPa MAP just shows that you are wide open throttle. The short term and long term numbers are 0 because it is most likely open loop fuel control. That doesn't really give us any information. I would not worry about the connector as Toyota only makes one harness and they tape back connectors not needed. Like it could be for a different emissions package or accessory or even for a manual transmission application.
