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1990 Lexus LS400 Questions

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every thing checks out except it will run for a little bit then shut off! If I turn the switch off and on some times it will run again. Runs ice cold when works. just put in new compressor Have had it on diagnostic test and nothing shows up.am at loss as to what it could be. but sounds like something electrical or swithch
It'll act like the battery is completely dead but when you put jumper cables on it immediately starts and I can run it a mile and a half before it shuts off while I'm driving
If I don't let my car warm up long enough and I begin to drive it wants to quit between 40 and 55 miles per hour, also during the day when I start driving right away it idles at 500 to 1000 rpms back and forth as I'm driving for a short time like the governing idle is messed up. What do you think is happening? Thanks for any advice
I am a light footed driver. I would think that the computer would adjust the timing. Thanks for your input. John Larson - Auburn, Washington
Not every time but completely random will this car die. So only when slowing down to come to a stop the engine will turn off. Usually doesn't start back up. Have waited minutes and it will start and sometimes have had to wait hours. Lights still work, the engine will try to start and wont stay running.
I replaced a dead battery and afterwards the cars starts but the auto transmission is locked in park position and headlights and other electrical devices don't work.
tail lights out replace bulbs with no luck. The fuse sizes in my used LEXUS don't match specs a friend told me. I need to know correct size of fuses.
The exhaust is getting red hot from the converter to the back of transmission.
Every time I brake all three brake lights do not come on. If there is someone behind me, they have no Idea when I am stopping. The fuse is good under dash and the bulbs are good.
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