Hey, I have a 93' ls400, 1UZFE. Approx. 180k miles. I have had the vehicle for 8 years. It came with an original maintenance 'book'. The previous owner wrote down all repairs and even gas mileage and price per gal. Out of all the repairs they did and what I have had to do, steering and drive components plugs etc. The only thing that hasn't been checked is the fuel injectors.
There seems to be a intermittent misfire it feels like. Low speed, hit the gas and it wont take off, above 35 hit the gas and it takes off like a rocket maybe a miss fire and it's good up to 90mph then kinda stumbles. I've watched your videos and I believe at least 2 injectors are leaking. In your opinion should I replace all the injectors? I had this same discussion with my dad. He said just replace them thinking they were as cheap as spark plugs. I replied they cost $120-$150 and I have 8 of them.
  I replaced the plugs and that gets deep with engine disassembly. I hope the starter never goes cause that's in the middle/heart of the vehicle. Would you have access to any information about this specific vehicle? I considered looking for the technical manual but, for whatever reason a 30 year old manual is still $200. I considered alldata but I don't know if it is what I need. Anyway.. Just trying to fix this. Thanks for any help.