Shogun 3.2 did 2003 Elegance. mk3
Having EGR symptoms, limp mode, running rough, black smoke etc.
This is intermittent I could park and start up and its perfect, drive round for miles no problem, stop and restart and its back again.
I have stripped and cleaned egr and inlet manifold and all ancillary pipework, still no difference.
Is there other places I should start looking at.
I just started up and unplugged electric to egr and nothing happened, I dont know if anything should happen on cold start and tick over.
Should I buy used egr valve and try that?
I have ordered new solenoid for egr but before I open and try it is there other things to try to isolate the fault. Have tried new map sensor but no difference.
Grateful for any help.
Regards to all.

 

At cold start the EGR might is deactivated (valve is closed) by ECU.
Check all intake pipes and intercooler for integrity (no holes/cracks etc), check inlet manifold for cracks. Check and clean the throttle valve.
Have you changed solenoid? Check the vacuum line to it.
Some EGR systems have temperature and/or pressure sensors, worth to check them.

For my outlander I have MUT-3 tool, one can drive and record signals like "egr valve position" and compare it to another recorded signal "target egr valve position". If there is a significant difference then something is wrong with that valve.