Question about 1992 Lexus Sc 300

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How to replace idle valve on my 1992 lexus sc300

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  • Lexus Master
  • 22,095 Answers

It has one wiring plug and two torx headed screws that is about all i can tell you as never done one on this car .

Posted on Feb 15, 2012

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  • 2 Answers

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Posted on Jan 02, 2017

WildBill49
  • 97 Answers

SOURCE: lexus sc300 engine problems

Does the car only die at idle with the A/C on, or does it kill the engine when switched on at road speeds? Are there any belt slippage noises (Squealing sounds underhood) when switched on prior to dying? A locked compressor will kill an engine at idle, but should squeal like a stuck pig (belt slippage) if switched on at speed (with a noticeable decrease in power) and will stall the engine when the throtle is let up.

A short in the compressor clutch could kill/depress electrical power to the engine sufficiently to kill the engine, but this should also blow a fuse unless it has been bypassed to "correct" a previous fuse blowing problem.

When the A/C is switched on, there is a throttle idle position compensation to accomodate the added load of the A/C system, and if this is not functioning it could cause the engine to die at idle with the A/C on, but it should cool normally at road speed if this were the problem.

There is also a secondary radiator/condensor electric cooling fan underhood that is turned on when the A/C is on to insure enough air is moved across the condensor coils to transfer (remove) heat from the Freon coolant, and a short in this motor or circuitry could also possibly cause a similar problem, as could also the interior fan system, though this is pretty unlikely.

With the engine off, locate the compressor/clutch underhood, and determine if the center hub on the clutch rotates freely or if it feels locked. If it feels locked, have someone start the engine and engage the A/C while you observe what takes place underhood. If the compressor clutch engages (with a noticeable "clack" sound but the center hub doesn't turn, you have a seized compressor which will need to be replaced. If it does turn but the engine does die, I'd suspect one of the other faults described above.

Hope this shed some light on the problem, and good luck!

Posted on Jun 07, 2008

mkv0525
  • 358 Answers

SOURCE: 1992 SC300 starts initially then won't start

fuel filter is hardly ever been a problem with a lexus or toyota.you need to check for spark at the plugs.then go from there.

Posted on Jun 17, 2009

emissionwiz
  • 75077 Answers

SOURCE: 1992 Lexus SC300 Air Condtioner blowing cool/warm

the system is low on charge, it has a leak, repair the leak and recharge

Posted on Jun 17, 2009

mkv0525
  • 358 Answers

SOURCE: windows wno't roll down

will need both motors and regulators if you are getting power to the window motors.

Posted on Jun 24, 2009

  • 81 Answers

SOURCE: 1992 lexus sc300 repair: Power Steering pump

replace the power steering pump. make sure you get crush rings for the hoses too. dont use stop leak stuff either because it WILL clog the filter in the power steering rack and then youll have to replace that too.

Posted on Aug 23, 2009

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replace the power steering pump. make sure you get crush rings for the hoses too. dont use stop leak stuff either because it WILL clog the filter in the power steering rack and then youll have to replace that too.

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