Okay I replaced the :
2)Both air filters engine and inside cabin a/c
3) water pump and upper and lower hose and new coolant
4)drive accesory belt
5)timing belt,roller tensioner bearing, idler bearing, hydraulic tensioner, cam seals, crank seal and water pump and gasket
6)I also cleaned the rear a/c filter
The car is running smooth as silk, no engine lights or anything, idle is smooth, starts very easly.
But on the trip the computer my mpg has dropped from a 22 to 17 mpg. The gas is at half a tank and it was full when I took it to the shop. The gas has not changed.
I have searched the web everywhere to find an answer and found none, because everything else mentions engine lights or roughness.
the only idea i have is about something I read about the computer going into a hard mode and reading sensors but I have no idea.