Hello Has anyone had experience with the the EGR system for 1991 Toyota 3 litre V6. Check engine light is on and it gives the code 71, which states EGR System fault. EGR valve tests OK, temp sensor tests OK, swapped out the EGR vacuum solenoid, even cleaned the EGR valve for carbon. Still show check engine light. What next? Any hints? Thanks Douglas W on Gabriola Island