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Skull_Leader

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  • Lexus Model
    sc400
  • Lexus Year
    1992
  • Location
    Texas (TX)

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  1. A few months ago, It developed a starting problem. It wouldn't start unless I held foot partially on the gas pedal, and I'd have to use the pedal to keep it from stalling a few seconds (hot, or cold, didn't matter. EVERY TIME I start it, I have to do that) But once it starts, it runs silky smooth at the time, I Ran Seafoam through it Changed ECT Cleaned IACV Cleaned MAF Changed driver side Ign Coil None of them worked. I was pretty sure, the ECU was bad, because the Check Engine Light never came on with ignition key on, though, while driving on the freeway, it did come on, dim at first, but as you press the throttle, it gets brighter...anyways, I left it alone for a while until I could get the time and money to get the ECU rebuilt Recently, I sent the ECU to a shop to be rebuilt, and they told me that it was in too bad shape to rebuild...ordered a rebuilt ECU on Ebay for $150. Hooked up the "new" ECU and the engine seems to run worse than before...It won't idle at all now, and when I use the gas pedal, and take it up the RPM band, it sounds as if the engine is running on 5 cylinders or something. but this time, I can at least check the codes. 22 ECT Sensor Signal 24 IAT Sensor Signal 41 TP Sensor Signal 47 Sub TP Sensor I've already changed the ECT sensor, so It's odd that it comes up... I removed it, and put it back in, to make sure everything was tight, pulled the ECU fuse, and it still comes back IAT I assume is Idle Air Temp? quick forum search tells me that it's in the MAF and does the TP codes indicate that I need to replace the sensor? or that it needs adjustment? and...wth is a "sub TP sensor?" This seems like waay too many codes especially since it was running so smooth with the old ECU (once it does start) could it be one thing causing all of those codes?? I'm at a loss here...I'll spend the $150 for the TPS if I have to...but it would SUCK if it STILL doesn't work...
  2. Welcome to the Lexus forums Skull_Leader :)

    If you would like help using our forums then please check out our forum user video guides: http://us.lexusownersclub.com/forums/forum-90/announcement-29-how-to-use-our-forum-video-guides/

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