Lexus SC 300 - Popular Questions, Answers, Tips & Manuals

R&R intake manifold

There is a coolant connection to the throttle body.

Most likely a leaky head gasket , the white smoke indicates coolant is getting into combustion chamber/ cylinder(s) could also indicate a cracked or warped head most often caused by over heating

hi ,have a look here Lexus Workshop Manuals please rate me if useful.thanks

Check your harness on the driverside, between the door and the body frame. The harness sometimes get spliced by the hole in the frame. This would cause the electronics wires to touch (sometimes work/ sometimes don't). GL.

With the car warmed up,feel the heater hoses,are they both warm/hot near the firewall in the engine compartment?If they are both warm/hot,then the heater core should have circulation through it and it may be a "blend door" issue in the heater a/c assembly.If they are not warm/hot then the heater core could be dirty and plugged up and needs to be flushed. If the above does not help,a drain and vacuum of the cooling system and vacuum refill will remove any trapped air. Sometimes,clamping off the top rad hose and holding the engine rpm at 2000 rpm will force trapped air out of the heater core.(Watch temp gauge when trying this) Lastly,a NEW thermostat doesn't mean its working correctly.

Has the TCM been scanned for fault codes, do that first and see what shows up that might explain this. It is very likely you just need to rebuild the transmission.

You need a scanner.

Hey Dan mac do you have interior lights and such when you turn key? If not check/charge your battery and try again-if you have lights etc. check alternator gauge and/or grab your handy dandy volt/multimeter to ck out put of alternator as it may not be charging your battery. If the starter is clicking but not turning over and battery is good then one suspects the starter or relay is at fault.

In the front passenger floor board against the fire wall pull up the carpet there's a black cover over it (pcm) there a company on ebay that will rebuild it for like 80 bucks if you're not getting spark it has a spark control box on the passenger fender well I think at least it's passenger it's on oNE of the shock towers under the hood it also has amodule inside the dist. Under the rotor button hope this helps let me know if I can help you more

What has likely happened is your Shift Knob on your automatic SC300 is not releasing the Key. Because it is not going 100% forward into Park. You should remove the trim around the shift knob. Including the Knob. The knob has a sleeve that slides down to reveal 1 screw that is facing the rear of the car. You should have the metal shift shaft. Wrap a rag around it and grab the top are and push forward with a good amount of force. You need to slightly BEND the shaft forward. Back into place. Selvol

Have you stopped with the steering loaded against the lock? Turn the wheel one way or other and see if it unloads the lock to allow the key to turn. If this doesn't do it you may need an auto tech.

You may have a bulb burnt out if the relay didn't help. Check all bulbs. If that doesn't fix the problem, you may have a broken blinker cam inside the steering wheel. (where the blinker lever connects inside) I would check in this order. Bulbs flasher relay signal cam

check headlight grounds to frame or body.

Ticking sound on top of engine usually points to sticking valves. Run through a good fuel treatment for a couple of fill up, it may just clean up some of the carbon and gunk, have the valves checked. Fuel treatment works folks, will even keep many of your sensors in good working order. Use premium gas when you do the treatment..

white smoke mean leaking head gasket.check engine oil look like milk shake antifreeze mixing with the oil.

Plz check relay that controls blinkers

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