Two weeks ago, my 87 MB 190E 2.3 8V has stall problem when braking due to low rpm. Then, I replaced idle control valve, fuel pressure regulator and OVP. Now, the rpm become high to 1200 rpm in "P" or "N". In "R" or "D" is around 750rpm. No stall problem again, but I still need find out why cause the idle too high in "P" or "N".

Also, I only can get 380km in 48Liters gas. Is it poor gas consumption??