What is the spark plug setting for Lexus LS400?

are you sure you didn't blow a head gasket?is it whit smoke?

its very possible that your problem of no fuel and no spark is the ckp sensor. or the crank position sensor. it is the only signal that the computer can not duplicate. and when that sensor goes out or stops working it also disables the fuel supply and the ignition system or in other words the spark to your spark plugs. i believe the sensor is located in the distributor. if not in distributor its usually somewhere on the front of the engine between the crank pully and the timming cover.

CHECK FOR SPARK AND FUEL.IF ALL IS GOOD A BAD COLD START VALVE WILL CAUSE COLD ENGINE START UP PROBLEMS COLD START VALVE DOES SAME JOB AS ENGINE COOLANT TEMPERATURE SENSOR IT ENRICHEN FUEL SYSTEM FOR COLD START UPS. DO LITTLE TUNE UP MAKE SURE SPARK PLUGS AND WIRES GOOD, REPLACE DISTRIBUTOR CAP AND ROTOR,CHECK IGNITION TIMING, REPLACE AIR FILTER AND FUEL FILTER. IF CAR GETTING FUEL AND SPARK.CAR TIMING BELT COULD HAVE JUMP TIMING IF TIMING BELT NEVER BEEN SERVICED OR REPLACED.

How to set the timing on a Lexus LS400 when changing the timing belt

Left head 3rd plug from the front. Heres a link, this engine is used from years 91-99. http://autorepair.about.com/library/firing_orders/bl-fo-8712.htm

Thanks for the clarification. Engine needs 3 things to run. Compression , fuel , spark.
It's turning over so you have compression.
Check a couple of spark plug wires for spark.
If you got spark , most likely no fuel.

Was it running before the "tune up" ?

there located on top of engine under the cover thats says V8 FOUR CAM 32, 4 S.P. on each side,remove both covers and its easy access after that.

try giving it a jump or re-charging the battery too.

Check your coolant level sounds like it might be low.

I did not know there was
any other engine than the