Recent content by eicca

  1. eicca

    2UZ plastic intake successfully installed on GS400

    An update, several years later... Now that my Lexus is healthy electrical-wise (a whole nuther story) it's noticeably quicker than my uncle's immaculately-maintained GS430. Maybe the intake makes a bigger difference than I ever realized.
  2. eicca

    Intermittent signal loss from all four 02 sensors

    I was underwhelmed by the V8 when I first bought it, but now it’s got quite the muscle. Very impressive motor, especially at 223k miles.
  3. eicca

    Intermittent signal loss from all four 02 sensors

    So I replaced the MAF plug three weeks ago and the engine has run fabulously ever since. Fuel trims are all staying within 2% of idle, with .5-1.5% variance between upstream O2 sensor readings. Everything is working as expected and the car feels sooooo much better. The torque comes on nice and...
  4. eicca

    A650e feels very weak

    It's the 25A EFI fuse in the block right in front of the battery. Small disclaimer, I used a 30A fuse because that's all I had on hand. Don't know if that has anything to do with it, but maybe try it just to replicate my experiment exactly.
  5. eicca

    A650e feels very weak

    I should update the resolution on this. Turns out the 25-amp EFI fuse was bad without actually being blown. Before you get out the pitchforks, I've removed and reinstalled the original EFI fuse dozens of times and reset the ECU dozens more with just the battery terminal. Never made a difference...
  6. eicca

    Toyota Sequoia 2UZ-FE Engine Swap

    It would probably be a lot more cost-effective and reliable to just sell the vehicle you have and get a vehicle with the engine you want, to be honest.
  7. eicca

    3uz Reflash

    Great, just another excuse to keep dreaming about a GS430 manual swap :)
  8. eicca

    Intermittent signal loss from all four 02 sensors

    UPDATE: I think I have traced the problem to the MAF plug. It seems like every time I mess with that plug, whether it's for cleaning the sensor, checking the air filter, or whatever, the fuel trims correct themselves for a short while and then gradually slide rich again. That's the one common...
  9. eicca

    Intermittent signal loss from all four 02 sensors

    I have, and the only one I can’t actually get to is the one that the ECU and O2 sensors ground through. It’s on the back of the block by the firewall. It’s labeled EC in the service manuals. I can speak from experience though, when that ground does get bad the whole car goes bananas. It went...
  10. eicca

    Intermittent signal loss from all four 02 sensors

    Further update: Spirited test drives today show the transmission is still working just fine. No slushy shifts when pushing hard. No O2 signal flatlining at all. Voltage readings oscillate as expected. Engine actually still feels plenty healthy, way better than it ever has. No misfires or...
  11. eicca

    Intermittent signal loss from all four 02 sensors

    Ok so it's starting to happen again. First symptom is the engine will fire really fast when cranking on cold start. When it's working properly it cranks for about 1 full second before firing. When the issue starts happening it fires after only a half second. Transmission is starting to feel a...
  12. eicca

    Intermittent signal loss from all four 02 sensors

    I can't believe that I forgot to update this thread. It seems like replacing that fuse fixed not only the original problem but also a host of little things that I didn't like about my car's performance. Not only is the ECU working properly again, but the transmission is shifting much more...
  13. eicca

    Intermittent signal loss from all four 02 sensors

    1998 GS400. I would love if someone could confirm what I found in the EWD. It looks like the O2 sensors and heaters are powered directly from the ECU and they all terminate at ground point EC. I checked all the connections and everything is solid. I pulled the negative terminal to wipe the ECU...
  14. eicca

    Intermittent signal loss from all four 02 sensors

    Been chasing down a running rich issue for a while now and I made a scary breakthrough tonight. All four O2 sensors are randomly and simultaneously flatlining. When it’s running normal, upstream sensors will oscillate between 0.1 and 0.7 ish volts and the downstream sensors will hold relatively...
  15. eicca

    Help: LR brake rubs when turning right

    This only started after installing new rotors and pads. Title says it all: Left rear rotor rubs only when turning right. I can’t tell WHAT it’s rubbing on though. I’ve bent the dust shield way back, removed and inspected the caliper, gave the wheel bearing the wiggle check, torqued wheel to...
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