1992 Air flow meter
 

I have a brand new air flow meter for sale. My 1992 LS400 is running very rough so i took it to the dealer for diagnosis, they said that I needed an air flow meter. I bought the part, installed it and I still have the same problem. The engine Idles very rough and hesitates badly, when put in drive, the car will barely move can anyone help???????? I am willing to sale the part for $800.00 it is over $1000.00 at the dealer