1994 Toyota Land Cruiser Q&A

1994 Toyota Land Cruiser Question: I have a Check light Malfunction that is intermittent Gives a DTC of 71, EGR

error shows when gas tank is filled, Erg modulater replaced, Erg pipes cleaned. Help -
Answer 1
put vac to egr with vac pump and see if it holds a vac to start with and while doing so with car running at idle the car should start to stumble if all ports are clean -
Comment 1
Thank You. To clarify,you suggest a Vac Gauge inline between erg and erg mod?. My error light is very intermittent and maybe Vac levels won't tell me much. I appreciate you comments. -