HI Everyone I have recently bought a Rav 4 2003 2lt D4D It had fault cods for glow plugs and poor EGR flow I changed glow plugs and EGR valve and cleaned the passages to valve They were not too bad .I cleared the fault codes OK but they keep poping back up for the EGR poor flow. Are they anyother components that effect the operation of the EGR or do you have a diagram of PIN volts for valve I am a fairy good mechanic and have been painting cars for over 30 years Thanks in advance