The "check engine" light should be illuminated. Start with investigating the code(s). They may lead you to the cause.
mark 4 supra, Lexus gs300, Lexus sc300 and Lexus is300
5w30
it is a straight six motor if you have the 2 JZ Toyota motor in it, that motor is also the motor that comes in the supra as well. But all ix sparkplugs are on the top of the motor in the center an two are are up under the throttle body.
To change the door window on a 1994 Lexus GS300, first, remove the door panel by unscrewing any screws and carefully prying it off. Disconnect the power window motor harness and any other connectors. Next, remove the window glass by unscrewing the clamps holding it in place and carefully lifting it out. Finally, insert the new window, secure it with the clamps, and reassemble the door panel.
To check if the radiator fan is working on a 1993 Lexus GS300, start the engine and let it warm up to operating temperature. Observe the fan; it should activate when the engine reaches a certain temperature. You can also test the fan directly by disconnecting the connector and applying 12 volts to the fan motor to see if it spins. If it doesn’t work in either case, the fan may need replacement or further diagnosis.
water in the fuel can cause an idling motor to sputter and/or die.
Rough idling is whenever the vehicle's motor "misses" or does not fire causing an imbalance and a loss of rotation reducing the motor's power and causing excessive shaking.
Yes!
check the engine mounts
If the passenger rear window of your 1993 Lexus GS300 isn't working, first check the window switch for any signs of damage or malfunction. Next, inspect the fuses related to the power windows; a blown fuse could be the culprit. If those components are functioning properly, the issue may lie in the window motor or regulator, which may need to be tested or replaced. Lastly, a wiring issue could also be at fault, so a thorough inspection of the wiring harness would be advisable.
No
Motor is idling rough.