Check your ignition coil. You have two. one on left bank and one on right bank. if one is bad car would not have any power but maybe idle fine. Might only go 20 or 30 miles per hour. Also would cause cat converters to glow red.
take it to a muffler shop
The 1991 Lexus ls400 has a timing belt.
Two
a timing belt.
If it has a timing belt ,no. If it is a chain yes.
The Gates website ( they make timing belts etc. ) shows the timing belt should be changed at 60,000 mile intervals on a 1993 Lexus ls400
The ls400 has 4 oxygen sensors the 2 main oxygen sensors are before the catalytic converters in the LH and RH exaust manifolds the 2 sub oxygen sensors are after the catalytic converters located in the exaust pipe under the car www.lextechautomotive
The timing is computer controlled, there is no adjustments. I know this is a little late, but timing could be off because the timing belt is not properly aligned. If the timing belt is installed incorrectly the timing will never be right.
Yes , the Gates website ( they make timing belts etc. ) recommends every 90,000 miles
I have a 1990 LS400 and I have never heard of a timing reset button. The timing is set by the timing belt and controlled by the computer. Let me know if you find out there is such a thing. vbd
Check the timing belt to see its off.. If the timing is correct them most likely you have a failed camshaft sensor..
The timing is set by aligning the timing marks on the camshaft pulleys with the crankshaft pulley. The easiest way is to use the markings on the timing belt. Then turn the engine by hand through 2 revolutions to make sure the timing marks line up.