1991 5.0 error code 67?
 

I just bought a 91 f150 5.0 with E4OD tans from a friend that had sat for over a year. I have been chasing down an idle problem for weeks. it ran fine before it sat. Sofar ive changed the tp sensor and adjusted it, the IAC, and gone through the vacuum lines witch were very bad. When i check for codes i get error 67 and the canister purge circuit failure, and the temp gauge doesnt work,also pulls code 332 insuficient egr flow detected. Would these cause the engine to stall after idling for about a min and surge while im driving?