Have a ‘96 Prado 90 1kzte with roughly 160k KM on it, new owner. After a few weeks with it developed rpm jumping at 80kmh, where the rpm would jump up 200-300, then drop down, then back up, as long as the car held at that speed.
Was inconsistent at first then gradually became constant.
Of note sometimes would eventually disappear after long highway drives, 30+ minutes, but less than that, and it’s a constant issue.
Have had all solenoids changed, new fluids/filter, even a rebuild, and the damn problems back.
I’ve seen a few other threads even one where someone mentioned the EGR being the culprit. Have not done any grounding checks or ECU inspection.
What else could I be missing? I think it’s pretty certainly not a primary trans issue, unless the valve body is bad.
I checked to make sure the brake light sensor wasn’t engaging too easily, have not checked the TPS yet. At one point I did tighten the kickdown cable which temporarily fixed things before it came back.
Anyone have more insights? I even tried pulling codes manually and the car didn’t return any codes, just the normal O/D flashing when checking.
Was inconsistent at first then gradually became constant.
Of note sometimes would eventually disappear after long highway drives, 30+ minutes, but less than that, and it’s a constant issue.
Have had all solenoids changed, new fluids/filter, even a rebuild, and the damn problems back.
I’ve seen a few other threads even one where someone mentioned the EGR being the culprit. Have not done any grounding checks or ECU inspection.
What else could I be missing? I think it’s pretty certainly not a primary trans issue, unless the valve body is bad.
I checked to make sure the brake light sensor wasn’t engaging too easily, have not checked the TPS yet. At one point I did tighten the kickdown cable which temporarily fixed things before it came back.
Anyone have more insights? I even tried pulling codes manually and the car didn’t return any codes, just the normal O/D flashing when checking.