War165

7 hours ago, Zeus253 said:

Try checking air vacuum connections, particularly the EGR plastic box (odd shaped) and the connection where intake air comes to meet the manifold throttle body. For example, in my 98 LS400 one of the many times I removed the big black piece connecting to throttle body manifold (near center of engine bay) ; I didn't make the rubber and hose clamp perfectly 100% and I had random things happen very briefly and intermittently. These events were: VSC off warning light, check engine warning, randomized low acceleration power, and most importantly - extreme automatic transmission gear change. Hope this helps!

Il have to check it out, my VSC light did come on a few times. I have an extra one in my trunk maybe replacing it would help with that one will help. 
 

also when I accelerate at times it does seems sluggish if I’m cruising around 40 50. 
 

il look into it thank you!

My ls400 has 198k, just recently replaced a solenoid because it was skipping 3rd gear entirely. Once in a great while when floored it’ll accelerate fine then when it shifts it slams into the next gear. I’ve tried it when floored on the highway and from a stop. 
 

it doesn’t slip gears at all, if I go slow it’ll shift into every gear smoothly but only when it’s floored. 
 

it doesn’t do it every time but only once in awhile. It’s a pretty hard shift, enough to feel like you’re being kicked..

when I did the transmission fluid change I used the correct fluid from the dealership. The magnets were also pretty clean for the mileage and so was the fluid. (Previous owner kept up on maintenance.

any help is greatly appreciated.