20 Most Recent 1990 Lexus LS 400 - Page 3 Questions & Answers

Over heating

IF IT STARTS WITH STARTER FLUID OR EVEN IF YOU WERE TO BUT SOME GAS IN IT MEANS NO FUEL IS GETTING TO INTAKE IT COULD BE A CLOGGED FUEL FILTEROR SOME KIND OF PROBLEM WITH FUEL LINE BUT THE MOST LIKELY THING IS THE FUEL PUMPYOU CAN TRY TAKEING OFF THE FUEL LINE AT THE EASYEST PLACE YOU CAN FIND TURN THE KEYTOSTART FOR 2 OR 3 SECOUNDS SEE IF YOUR GETTING GAS COMEING OUT OF LINE IF NOT YOU NEED TO CHCCK TO SEE IF THERE IS POWER GOING TO THE PUMP CHECK FOR FUEL PUMP RELAYS OR RELAY MOST LIKELY IS THE PUMP IS BAD THERE A WARE PART AND NEED TO BE REPLACED EVERY 10 TO12 YEARS OR SO GOOD LUCK

AKA THROTTLE POSITION SENSOR IS ON THE SIDE OF THE THROTTLE BODY.

maybe a vacuum line has a hole or is off completely. it could be a brake booster even.

sir pl z told me Toyota 1uz assamble the head ,so one time i com pleat the trque, than agan the open bold and retired , and pl z bold secvence titnes

Hatterasnc,

You're alternator has gone bad and the vehicle was running on battery power. The "clicking" sound is your now dead battery that does not have enough power to turn over the starter. You might also want to check your power steering pump for leak. This is a know problem with early LS400s and will most likey be the cause of the alternator failure. I just dropped $1050.00 to fix the very same promblems you have.

the ignition module has to be at fault giving no signal for spark control for your ignition coils to fire

if the battery is all right, the starter or igniton have a problem.obd2 tools

take the timing belt off reset the crank at 0 with # 1 piston at TDC ensure that both cams are up at twelve 'oclock with belt on, when the tension is released and the tensioner is tightened turn the crank atleast 360 degrees and ensure that the timing does not shift before starting engine

the timing belt is not aligned on the correct tooth.....

The RPM signal comes from the crank sensor. The harness connector needs to be checked for a 5v reference signal and the ground side needs to be checked for a good ground. This test is to rule out the computer as being the issue. Then the signal wire needs to be checked for a good signal. When the crank sensor fails you get not spark and no fuel., You will need a waveform viewer to determine if the sensor has failed. You will need a basic meter to determine if the computer has failed.

You blew the fusible links,here they are.They are under hood,maybe close to battery in box.Just follow positive battery cable to it.

After you connect the good battery to the bad one (the car makes alarm sound), just start the car and the alarm will go off.