This is to clarify some incorrect information out there. I have confirmed this through testing in reverting my red Accord back to a stock F22a4 motor setup with stock PT3 ECU, from a performance chipped P06 ECU setup:
Installing an EGR block-off plate with a stock PT3 or PT6 ECU requires the EGR valve to be electronically & vacuum connected, as well as the EGR control solenoid in the emissions control box.
If you install the EGR block-off plate with only the EGR valve connected electronically & vacuum, that will still throw a CEL, as the EGR control solenoid needs to be operational as well.
If you have chipped ECU that does not recognize and EGR system, you are all set (ie. P06, etc). All you need to run is the MAP sensor from the emissions control box and can eliminate the rest.
Installing an EGR block-off plate with a stock PT3 or PT6 ECU requires the EGR valve to be electronically & vacuum connected, as well as the EGR control solenoid in the emissions control box.
If you install the EGR block-off plate with only the EGR valve connected electronically & vacuum, that will still throw a CEL, as the EGR control solenoid needs to be operational as well.
If you have chipped ECU that does not recognize and EGR system, you are all set (ie. P06, etc). All you need to run is the MAP sensor from the emissions control box and can eliminate the rest.
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