5th Injector Leak if disconnected and EGR valve

[emtaboy]

Hello.  Like many others, having white smoke issues on 2AD-FHV D-CAT engine, and problem narrowed down to 5th injector.  Mechanic wants to just delete it from ECU to stop all regenerations.  I realize implication for the DPF if this is done and need to empty it.

My question is if this 5th injector, when mapped out of ECU but still connected to fuel pump, will eventually leak?  That is, injector was not designed to stay closed permanently, and when still receiving fuel under pressure from pump, can't it eventually leak and, again, result in white smoke?

 

Mechanic also wants to disable EGR from ecu when doing the reprogram.  If this is done, engine is still emitting exhaust up through tube to EGR valve, which of course will be closed after delete from ECU.  But the entire tube going from bottom of engine to EGR valve will eventually fill with carbon buildup.  Wouldn't it be better to place metal plate at engine block to stop all exhaust gas from entering EGR tube instead of just allowing it to become stuffed with carbon buildup?

 

Thoughts appreciated.  Thanks you.