I would like to install a plate or SS washer without the hole it, to block Exhaust from entering the intake manifold, while leaving the EGR valve free to open an close.

I have 2 questions:

Will any sensors detect the lack of exhaust gas and effect performance, or throw a Code ?

Does eliminating the exhaust gas from re-combustion and hence raising the combustion temp, effect engine reliability?

I what to keep the intake clean after the mess I found earlier.

Thanks,