Where do I start except that buying my Lexus was a mistake. I have a 1991 LS400 ran good for a week and then out of no where died when I came to a stop. I pushed it to the side and tried to start it for 30 minutes. It finally started and I got it home. It was sputtering really bad. I let the car sit for a couple of days and it fired right up. I drove it for about a mile or so and it started sputtering and trying to die on me. I got it home and shut it off and tried to start it, but it took forever to get it cranked and then the rpms would jump up and down. Eventually the engine would die. This is what has been replaced below:
spark plug wires
I called the independent Lexus mechanics that worked on my vehicle and they said what they did to make it quit sputtering, stalling, etc.. is cleaned off the cables going to my crankshaft position sensor and reconnected it. They told me that the sensor could be going bad. So what I did is ordered the Crankshaft position sensor and should be getting it tomorrow. I've done threw to much money into it to back out now, so has anyone else ran into this problem. Any information is appreciated.