Actually, I would remove the EGR and check it to make sure it is carbon free and working properly. As far as the lean mixture, are you sure you got all the vacuum leaks?
April, 27, 2010 AT 2:47 PM
Well my mechanic did a smoke test and seems to be of the mind that he got all the leaks. There's only so many places the vac lines go.
As for the EGR valve I removed it myself and ran a brush over both orifices there was no huge build-up of carbon, AND while putting a vacuum on the vac port I could see the 'pintle' travel upwards which I took to mean that valve is doing its job. What I really can't see is the valve seat for all I know it could be completely fouled BUT I doubt that would cause an insufficient EGR flow indication. Logic suggests such a condition would a cause excessive EGR flow, No?
April, 27, 2010 AT 11:25 PM
Did he check engine vacuum hoses? Usually a smoke test is for the EVAP system.