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  1. A

    Small knock or rattle under load coming from the engine!

    Hi, I have a 1FZ-FE 1997 Lexus LX450. I have can hear a small knock or rattle (really hard to define the noise) but its coming from the engine itself its basically happening under load when you accelerate from 1st gear to 2nd gear around 900rpm to 1500rpm, if I gas it up until 1900rpm then the...
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    o2 sensor questions

    Hi, 1FZ-FE 1996 here! I'm hunting my Consumption issue and seem its the O2 sensor Bank 1 Sensor 1 but what I'm trying to figured is that is it the Sensor itself or the harness that goes to the the ECM. Here is the sign: on the OBD2 live Data the Reading of the O2S1B1 is 0.00 Volt even if I...
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    Help for 02 sensor reading

    Hi, I have a an Lx450, 1997. Lately the truck is drinking a lot. So I start to diagnostic step by step. I'm now test the o2 sensor. As I saw and read we can test the o2 sensor resistance with just a multimeters. So I did a test with my multimeters and the reading is 14,7 of resistance. Is this...
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    Driveline Clunk

    Hi, I have a full time 4wd Lx450. When the truck is in 3 gear I can hear a clunk noise when releasing acceleration pedal and re clunk when re accelerate again. What it can be? Transfers case? or U joint? I don't hear it in 1 gear or 2nd gear!
  5. A

    2 Codes! Need Help

    Hi, I have an LX450. 1996 with 1FZ-FE stock. I have this 2 code: P0125 P0401 The first one I think it's the thermostat but the second one it EGR but is it the unit itself? The Gas milage is now TERRIBLE. 5.2 gallons for 28 Miles. Thank you
  6. A

    Weird Idle with AC on/off

    Hi, I have a 1997, Lexus LX450. 1FZ-FE. Stock. You guys know when the AC is one the compressor AC clutch will not engage all the time right. Its engaging and turn off itself. So when the I have the AC on but compressor clutch is not engage its idle low and a bit tiny rough (600rpm) and like 1...
  7. A

    1FZ-FE Rebuilt but have a Rod Noise when Cold Start

    Hi, I just do a master rebuild of the 1FZ-FE. The engine is rebuild with 0.25 clearance not standard. I notice a BIG loud noise when cold start or when the truck is sitting for 3 to 4h. The Knock noise last for about 2 seconds! the times that RPM goes up and down when starting. What is this...
  8. A

    LX Build from Cambodia

    Hi! I'm based from Cambodia. I used to off-road pretty hard on my previous 3rd Gen 4runner but sold that good girl for an LX450. World of difference. The lx is way more reliable and more confortable for any kind of trail. Here is her spec: LX450, 1997, no lockers. 4" Lift from Ironman 4x4...
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    Should I rebuild mine or not?

    Hi, I have an LX450. 1997. 1FZ-FE obviously. The engine is totally not a sport car but it a real pig on gasoline. I have a fews sign that may want want me to rebuild the engine. - Small amount of intermittent smoke from the tail pipe, don't know if its white or blue it's really small amount...
  10. A

    Needle become crazy! LX450

    Hi, My Speed needle become crazy and goes up an down like crazy. Its happen when I put on D and let the truck drive by itself, or slow driving or when I hit a pothole. and I can feel the transmission shift back and forth also because of that! I assume that the speed goes crazy up so the...
  11. A

    Slow acceleration from stop

    Hi, I have an LX450 with 1FZ-FE. I just rebuild my transmission with a new auto clutch disk, cleaned the valve body, replace the spark wires, sparks plugs, cleaned the throttle body, fixed the Knock sensor, clean the TPS , replace the fuel filter and still Sluggish when accelerate from Stop. I...
  12. A

    PCV Valve symptom

    Hi, Is it real that a bad PCV valve can lead into a Burning oil and also smoke from the pipe? Thank you A.
  13. A

    Griding Noise when Throttle and off throttle

    Hi! there I went on highway this week-end! I can hear a WEIRD grinding noise. It's not constant. It start to happen when reaching around 40mph and disappear 1 second later and grind back if I reaccelerate again. So the grind noise kinda happen when I press and depress the gas pedal from 45 or...
  14. A

    2nd Gear Slipped

    Hi, I have a 1996 LX450. I did notice that the truck is not that responsive to the throttle as before. So I did a test with the 2nd Start button! and I can see the RPM goes to 2k and the speed still zero and the car is moving slowly until the until RPM hit 2.5K then it's start to have more...
  15. A

    LX450 is not a Prius but should not be awful like that

    Hi, I have an LX450! 1996 Model with 1FZ-FE (gasoline). I have 4" lift, 35 inch Tires Mud Terrain. Stock Gears. My MPG is around 7.5. Changed the plugs, clean the TB, Air Flows, and all the Air or throttle system. I wish to have at least 9 or 10MPG if possible. I planned to bring the truck...
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    1FZ-FE seems not as responsive as I expected!

    Hi, I have an LX450! 1996 with 1FZ-FE on it. I'm coming from a 5VZ-FE off the 4runner 3rd Gen. I just feel like the 1FZ-FE is not super responsive. it does get some speed when you keep pushing the gas pedal but at the beginning its feel like it's doens't have a "peps" I did changed the Spark...
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    LX450 give a small white smoke only on Gasoline not on LPG (LPG expert needed)

    Hi, I posted a few days ago that I have a white smoke coming from the exhaust pipe. Small tiny white smoke. My LX450 is a 1FZ-FE engine. I do have LPG conversion also. So I was curious yesterday I switch back to LPG and no more white smoke. So this mean that the pipe white smoke only when I'm...
  18. A

    1FZ-FE blow small amount of White Smoke [HELP]

    Hi, LX450 owner here. I have some white smoke coming out of the pipe of exhaust. I have a 1FZ-FE. Petrol with LPG conversion. I stopped using LPG for 2 weeks already but I notice some small white smoke out of the Pipe. I discovered also that the previous owner took out the Thermostat also. So...
  19. A

    1FZ-FE LX450. Engine Temperature goes up really SLOWLY.

    Hi, I have an LX450. 1997! 1FZ-FE. I notice that the Engine tool about 15 minute to go hot. And IF I drive under the rain the Engine temps to DOWN to the lowest point. What can the problems? Thank you. A.
  20. A

    LX450 give a small white smoke and no more

    Hi, I live in cambodia. Pretty hot country around here. I notice a SMALL tiny white smelly smoke this afternoon. Shut it down for about 30 minute and restart is and the smoke is gone. What this can be? Thank in advance
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