Those are good places too start. I would start loking at the EGR first. But it may not be EGR thas is bad...
I am not sure on 95 sentras if EGR is controlled (opened) by vacumm or some electronic switch.
EGRs are opened by vacumn pressure or the ECU to recirculate exhaust fumes back into the intake to be reburned, thus saving the enviroment.. You may have a STUCK open egr. This would make a big leak at idle.
EGR should not be open when cold or at idle thats why they are controlled by water temp and or ecu.
Does this make anysense??
You can remove and clean out carbon deposits and reinstall. Worst case you may hav too replace the EGR valve.
Are you familiar with EGR valves? its the thing on the intake with a metal tube thats connected to the exhaust.
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Barry
1993 King Cab SE 4wd- SAS, 35s + stuff
1992 Pathfinder SE 4wd - SAS 33s + stuff
2004 Quest SE
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