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While doing some work on my car in preparation for the track season starting up again in the spring, I find that I'd really like to get rid of the EGR plumbing since the heat from this is not favorable to some of the extra plumbing I have installed for my intercooler setup.
There seems to be conflicting information about whether capping the end at the exhaust manifold and capping the end at the EGR valve under the plenum and removing the plumbing (but leaving the EGR valve connected to the ECU) will or will not cause a CEL condition on the V8 cars. I'm running the Lotus yellow high-torque ECU code on my car.
Is there definitive information one way or the other on whether leaving the EGR valve hooked up but having the stuff capped and removed in between will or will not trip a CEL condition? I have heard some folks doing this with no code thrown. I also know that there is the supposition that the sensor on the EGR valve is a temperature sensor used to confirm exhaust gas circulation, but on most other EGR valves the sensor is a valve position sensor used by the system to PWM control the valve position, and leaving all this stuff hooked up will result in the valve position indeed moving as expected by the ECU.
So what's the definitive word on whether capping this will throw the CEL? If this does indeed throw the CEL, will a firmware change to the red ECU code from the yellow I'm running now avoid this issue (I understand the red code doesn't use EGR) and is there any issue with the red code passing the emissions test (in Oregon they just plug into the OBD-II port and check for codes).
Thanks for the team's advice, and Happy New year.
Knut
There seems to be conflicting information about whether capping the end at the exhaust manifold and capping the end at the EGR valve under the plenum and removing the plumbing (but leaving the EGR valve connected to the ECU) will or will not cause a CEL condition on the V8 cars. I'm running the Lotus yellow high-torque ECU code on my car.
Is there definitive information one way or the other on whether leaving the EGR valve hooked up but having the stuff capped and removed in between will or will not trip a CEL condition? I have heard some folks doing this with no code thrown. I also know that there is the supposition that the sensor on the EGR valve is a temperature sensor used to confirm exhaust gas circulation, but on most other EGR valves the sensor is a valve position sensor used by the system to PWM control the valve position, and leaving all this stuff hooked up will result in the valve position indeed moving as expected by the ECU.
So what's the definitive word on whether capping this will throw the CEL? If this does indeed throw the CEL, will a firmware change to the red ECU code from the yellow I'm running now avoid this issue (I understand the red code doesn't use EGR) and is there any issue with the red code passing the emissions test (in Oregon they just plug into the OBD-II port and check for codes).
Thanks for the team's advice, and Happy New year.
Knut