Ok so this is the story, I have a 93 Ls400. When it first started acting up it would get very quiet then the hesitation and running like a lawn mower type of deal would start till it eventually would just shut off. It would do this every 3 to 5 days at first then it became more frequent, it wouldn't crank back up right away so I would have to sit for a while crank it and try to get home befor it would shut off again. It has got come to the point where it just wouldn't start, some days it would but only for a while. I did a full tune up, coils, ignitors, maf sensor, altenator, battery, fuil filter. With no progress of doing those things I had the cats gutted, I have a friend who has the same year that gutted his and its running fine but anyhow still no luck. I went and pulled a ecu off one in the savage yard and it cranked after a few tries, you could barely turn the key and it would fire up. So that held up for bout 3 days then it gave me different problems ie. cats would turn red which are gutted mind you, and the crank somedays deal but no it just won't start. The guy who has it now can't figure it out, he's had it for about 10 months now, he said its got good compression and is firing, he checked the timing which was fine, also he tested certain parts from a running ls400 and still no changes far as the coils, ignitors, maf sensor. He wants me to test the ecu's out so im going to test them on a running ls400 to see if its that possibly the problem. If that doesn't work does anyone know anything that could help me solve this mystery. Only thing I could think of if this doesn't work is maybe a faulty wire in the harness or someone said something bout a fuel injection sensor but anyway I would appreciate the knowledge if you have any Ideas that could help me out. Thanks for taking the time to read this everlasting event.
