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SC400

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Question
Car idles high at startup
The idle air control valve on your car may be defective, causing the high idle. A couple of checks would need to be done to determine if this is the case. Your engine needs to be checked for any vacuum...
Question
Engine not running properly after starter change.
This sounds to me like something was done incorrectly during the repair. Engines now have many sensors that all feed back information to the many computers of the vehicle. If any sensors were left unplugged, that is likely your issue....
Question
Alarm goes off suddenly
Hello. It sounds like your Lexus SC400's immobilizer in the alarm system is working intermittently and in need of repair. It is possible for you to disable the alarm system, but this is not a simple job and therefore not...
Question
Rubbing sound upon turning to the left
Hello. The tires may be rubbing against the fender well or a suspension part. There could also be a problem with the axle or the sway bar link on the left side, where the noise is coming from. I would...
Question
Noise at higher speeds, engine revs in park
Hello. The first step would be to have the new tires that you installed inspected for defects and to make sure that they were properly balanced. I would also have the wheel bearings checked as they could be causing the...
Question
The car shuts off after an hour in the sunlight
Hello. There may be a problem with the mass airflow sensor on your 2000 Lexus SC400. If the sensor overheats and sends a false reading to the car’s computer, this may result in the engine shutting off. The coolant temperature...
Question
Car misfires when the weather is cold and while idling
Hello. Thanks for writing in about your 2000 Lexus SC400. It may be necessary to replace all of the ignition coils in addition to having the ignition coil wiring inspected for damage in order to determine why your engine is...
Question
Advice on buying a '93 Lexus SE with a 2JZ engine with a blown head gasket
If they did blow the head gasket, there is no saying what they did to the engine. You can of course, take it apart. It's a nice engine. It's a straight six -- not a V6. So you only have...

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