RacWolfy

I would take a look at the throttle position switch first. Try to to check the easy stuff before you jump the gun ,I had my ECM redone by the guy on EBay in Van nuts it still works fine .

Hi I had this happen on my 93 LS 400 all the dash back lighting would blink and go out randomly, it did not go away I found a place on eBay that replaces the transistors in the cluster for $150 I removed my dash sent it off and the sent it back with the blinking back lights fixed,but now my tach doesn’t work and the tip of one of the needles is a little dull but a new cluster is $1900 from the dealer ,the transistors burn out after a while , I had to have my computer for the car refurbished as well . Good luck 

So I  figured out what the deal was ,Two weeks prior to the incident I had my neighbor,a retired mechanic replace the front crank seal , he had the front of the engine tore down and when he put it back together he put the top radiator hose on backwards,so it did not clear the fan ,but we did notice because the top cover concealed it and the fan just stoped on the hose quitetly until the fan bearing got roached and sent a grinding sound through the intire car coincidentally the next next morning when I started the car after the bottom out , when I started investigating I saw the fan was hitting the hose and thought the engine had raised, checked motor mounts and realized  the hose was backwards and stoped the fan and ruined the fan  bearing , I did replace my trans mount anyway , that got rid of the heavy clunk when starting, anyway I bought the new bearing and John wanted to installed for free he was very embarrassed for having installed the hose backwards as I was for not noticing it as well anyway, I guess it was a false alarm, but thanks for responding and the segestion Craig that was a good call . Thanks Rob 

Hi I have a 1993 LS400 with 165,000 I bottomed out on something going slow ,now my engine is 2.5” higher in the front fan is hitting top radiator hose ,grinding noise coming from transmission has anyone seen this before?