<<Doubt 7 and 9 are related to EGR fault
But 7 can be coil tower resistor connectors [ thus bad idle]and 9 can be IAT sensor unplugged at cross-over pipe or someone unplugged it while running and did not reset the code..>>
This car is new to me, could someone tell me where is the tower resitor connectors are and where the IAT sensor is? I will be roto-rooting the pipe connecting the EGR to the intake manifold this weekend. Thanks.