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  1. bubfuji

    ‘93 FZ80 Engine shuts down randomly only after it’s warmed up…

    For the GM canister replacement... Next time your troubleshooting, Remove the gas prior to starting.
  2. bubfuji

    ‘93 FZ80 Engine shuts down randomly only after it’s warmed up…

    You're describing the fuel pump logic from a 3FE. Yes. I realized after I hit reply I edited the post.
  3. bubfuji

    ‘93 FZ80 Engine shuts down randomly only after it’s warmed up…

    Edited: Jumping the pump at the check connector will bypass the VAF fuel pump trigger. You should be able to feel pressure in the fuel lines, and/or hear the fuel pump hum if you go to your gas tank and listen. Running the pump at the check connector will not energize the COR relay (you need the...
  4. bubfuji

    ‘93 FZ80 Engine shuts down randomly only after it’s warmed up…

    What does "boiled my fuel" mean. I have never heard of this. Your engine over-heated at the Ophir summit which did something to the fuel system or fuel delivery?
  5. bubfuji

    ‘93 FZ80 Engine shuts down randomly only after it’s warmed up…

    Just clarifying. You changed the battery terminal posts or the battery terminal clamps? Or your battery cables terminate with large eyelets that you bolt to the battery? You have done a lot. The engine dies gracefully, no coughing, and no stumbling. Just turns off like the key was turned. As...
  6. bubfuji

    ‘93 FZ80 Engine shuts down randomly only after it’s warmed up…

    Here is a link that describes your condition (FJ62). While the 80 has a different engine. The VAF function and starting circuit are almost the same. In this case, the Circuit Open relay (COR) was bad. FJ62 Idle/Stall Issue -...
  7. bubfuji

    ‘93 FZ80 Engine shuts down randomly only after it’s warmed up…

    For the IAC, see if the out of spec Ohm readings are repeatable. Clean the contacts, etc. It is a stepper motor. So every time power is applied (pulse) the IAC will open or close about 1mm. A traditional motor would run until power is removed. The IAC will only open or close by repeated power...
  8. bubfuji

    ‘93 FZ80 Engine shuts down randomly only after it’s warmed up…

    I will check my spares to see if I have an IAC.
  9. bubfuji

    ‘93 FZ80 Engine shuts down randomly only after it’s warmed up…

    It is good to see your idle back were it should be (check). I do not remember all your posts. Did your rig die at idle or while driving at speed as well? The VAF sends a fuel pump on when air is pulled into the engine. The flapper opens and turns on the fuel pump via the "Circuit Open relay"...
  10. bubfuji

    ‘93 FZ80 Engine shuts down randomly only after it’s warmed up…

    Install the new one. Just so you don't have to do it twice. If I take the condition of the ECT in to account. Install the new one. Follow the install steps, if the idle does not fall back to 650 +/- rotate the TPS slightly to see if you can get to 650rpms +/-. The curious thing is, the IAC...
  11. bubfuji

    ‘93 FZ80 Engine shuts down randomly only after it’s warmed up…

    I have 2 VAF's. One I need the other was for backup. They both work. I will send it out if no one else has one closer. I think your high idle is one of the contributors to the engine dying. The high RPM could be advanced timing, an air leak, IAC, or TPS setting. The air leak presents as...
  12. bubfuji

    ‘93 FZ80 Engine shuts down randomly only after it’s warmed up…

    I was able to see the video. It does not look specifically fuel related. Maybe not the coil/wires. However you need to go through the steps. The engine dies gracefully... No sputter, cough, rpm jumping, or rough idle Runs fine and then not. Your temp gauge shows a warm engine. Your idle is too...
  13. bubfuji

    ‘93 FZ80 Engine shuts down randomly only after it’s warmed up…

    OBD1 would not flag a failing coil. The FSM shows a list of CEL codes and definitions. The spark plug wires and coil wire can go bad. The Toyota OEM wires are really good wires. That being said, when spark plug wires go bad. It is usually in the form of increased high Ohm resistance or leaking...
  14. bubfuji

    ‘93 FZ80 Engine shuts down randomly only after it’s warmed up…

    OBD1 is very, very basic. Your ECU may be loosing power? On my rig, I had a cracked battery clamp. The rig would die every time I hit a speed bump too hard. One of the wires in the fusible link sends power to the ECU circuit. Add test wires to the ECU power wires for the engine circuit. Then...
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