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S.O.S. to all sc400 owners

 
Old 02-03-10, 06:58 PM
  #16  
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Originally Posted by lexsc4oo View Post
Not sure if anyone else has tried this but mine started to do this, when idling would cycle from 750-2000. i loosened the tps up and turned it about a 1/8th-1/4inch turn to the right and for some weird A** reason problem solved idk how but it did.
I had the same problem and after putting new rotors, caps, wires, plugs, and maf no change all it took was loosening the tps give a little turn and not only did it work the throttle response was much better.
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Old 02-03-10, 11:15 PM
  #17  
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Originally Posted by 5sp_jzz30 View Post
...the radio wiring has nothing to do with that port either. nowhere near it.

sounds like your mechanic is a ******-tard. get someone that can actually diagnose cars....
Your mechanic may just have worked on Pinto only. The diagnostic terminal of the SC400 is on the driver side next to the IACV in the engine bay. That's nowhere near the stereo wiring that's inside the dash inside the car. The kick panel around that area only has fuses.
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Old 04-03-10, 06:08 AM
  #18  
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Default rough idle, engine dies when restarting hot, top speed 15mph

I just solved this problem after a year of replacing parts and troubleshooting. Your symptoms sound similar to what i had going on. I would suggest buying a new or (used with warranty) Fuel Pump ECU. After new plugs, coils, wires, vacuum hoses, intake pipe, earth grounding kit, etc., i still had the problem. some of the solutions worked temporarily, but for a month now i have had no problems. for an entire week the car randomly had a rough idle, would die after restarting it hot, no power after taking off from a complete stop. it originally wasn't all of these problems, but it progressed over time. i would not recommend the bypassing solution for the fuel pump ecu, i got a used one with a warranty on ebay for $90. compared to most of the other parts, this ones not to expensive. its held on with a single bolt behind the driver-side back-seat armrest panel. 30min fix.
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Old 04-03-10, 06:53 AM
  #19  
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Originally Posted by RIXSC4 View Post
I just solved this problem after a year of replacing parts and troubleshooting. Your symptoms sound similar to what i had going on. I would suggest buying a new or (used with warranty) Fuel Pump ECU. After new plugs, coils, wires, vacuum hoses, intake pipe, earth grounding kit, etc., i still had the problem. some of the solutions worked temporarily, but for a month now i have had no problems. for an entire week the car randomly had a rough idle, would die after restarting it hot, no power after taking off from a complete stop. it originally wasn't all of these problems, but it progressed over time. i would not recommend the bypassing solution for the fuel pump ecu, i got a used one with a warranty on ebay for $90. compared to most of the other parts, this ones not to expensive. its held on with a single bolt behind the driver-side back-seat armrest panel. 30min fix.
I wish I spoke to you weeks ago...
Right as of now my car is in the middle of an engine swap, mainly for an engine wire harness that comes with the motor & a warranty. I will mention the Fuel Pump ECU to the mechanic as a precaution.
Thank you for the heads up
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Old 04-03-10, 07:20 AM
  #20  
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yeah he is 100% right there is a port under the dash and one in the engine bay eight on top of the engine. Just go to autozone or napa and give them your ID and they will let you use their diagnostic tool for free. Pull your codes and look them up. It will atleast give you someplace to start.

I personally was thinking MAF or a bad ground somewhere
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Old 04-03-10, 10:52 AM
  #21  
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Originally Posted by TheRonTom3 View Post
yeah he is 100% right there is a port under the dash and one in the engine bay eight on top of the engine. Just go to autozone or napa and give them your ID and they will let you use their diagnostic tool for free. Pull your codes and look them up. It will atleast give you someplace to start.

I personally was thinking MAF or a bad ground somewhere
I changed the MAF a while ago, the major problem I'm having with my car is the lousy engine harness. Thanks for the info on my problem but right now i'm waiting for the mechanic to finish the engine swap. He says he will check for any other problems.
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Old 04-30-10, 11:40 AM
  #22  
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Any updates?
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Old 04-30-10, 12:44 PM
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Originally Posted by skirts View Post
Any updates?
As of 4/30/10 my car has been running like a champ thanks to Richie & crew @ Fixed Rite Auto http://i868.photobucket.com/albums/a...cture006-1.jpg
They did an outstanding job repairing my car. I highly recommend them to anyone in need of a Lexus specialist in Brooklyn.
The main culprit was a faulty ECU & a bad engine wire harness. I opted to have them swap the old engine for a recycled unit.

Last edited by 718murdoc; 03-27-13 at 08:23 AM.
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Old 04-30-10, 06:17 PM
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im happy to hear you got your car fixed

NOW

buff out those headlights
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Old 04-30-10, 06:34 PM
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Originally Posted by cino21 View Post
im happy to hear you got your car fixed

NOW

buff out those headlights
I would buff them, but they'll just start to yellow out again. I'm planning to take the next step & either clear-coat the lenses or just buy new units.
Thanks for the compliments.
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Old 04-30-10, 09:21 PM
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try some stuff called BLUE MAGIC

http://bluemagicusa.com/index.php/bl.../products/101/

yes it does do what the pic's suggest

the lense is plastic.
its UV coated.
the UV has worn off.
even if you polish the lens and clearcoat them it still will go yellow because the lens has no UV coating.

1. keep polishing the lens every 2 - 3 months
2. buy late model lenses and glass high beams

Last edited by v8soarer91; 04-30-10 at 09:25 PM.
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Old 04-30-10, 10:15 PM
  #27  
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Your SC is beautiful.
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Old 05-01-10, 10:19 AM
  #28  
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Originally Posted by v8soarer91 View Post
try some stuff called BLUE MAGIC

http://bluemagicusa.com/index.php/bl.../products/101/

yes it does do what the pic's suggest

the lense is plastic.
its UV coated.
the UV has worn off.
even if you polish the lens and clearcoat them it still will go yellow because the lens has no UV coating.

1. keep polishing the lens every 2 - 3 months
2. buy late model lenses and glass high beams
Thanks for the link, I'll be looking into this product.
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Old 05-01-10, 10:22 AM
  #29  
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Originally Posted by BostonSC4 View Post
Your SC is beautiful.
Thanks
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Old 05-01-10, 07:44 PM
  #30  
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this is an interesting thread and also you have a very nice looking car 718murdoc.

I've taken my car to a shop that i really trust and then had my own personal mechanic look my car.

They both said that the car is running perfectly normal and nothing is wrong with it. Although i dont buy that because i've been having hesitation issues and rough idling. So what i did was change the spark plugs and did a quick wipe in the throttle body. After that, i take the car for a spin and just like that the car rides smooth. Now its back to acting up again and im not sure what it could be. I thought maybe throttle body but i just dont think thats the case. How can i check if the ECU is good or not?
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