Hi guys, new here,
Thought that I would add some details from my EGR programming experience.
Engine Operation.EGR
{B1501} EGR Control, changed from "Enable" to "Disable".
{B1503} EGR Minimum Engine Temperature, changed from "5.0" to "150.0".
{B1504} EGR Maximum Engine Temperature, changed from "105.0" to "-40.0".
{B1530} EGR Cooling Monitor Lower RPM, changed from "600" to "4990".
Speedometer
{H0136} Tire Revolutions Per Kilometer, changed from "421" to "378"
These are the only parameters that I had changed from the bone stock tune. The result was, more power, but a few dead spots during hard acceleration. no codes thrown. I am guessing that the EGR valve is being used to control intake temperatures and the fuel tables need to be adjusted to accomodate the lack of hot exhaust gasses in the intake manifold.
I also have a question; I see allot of mention that if the boost level excedes 28 psi the EGR valve will be pushed open, would it not be opposite to this and if the exhaust pressure is too great the EGR valve would be forced open? I ask this because the dirrection of exhaust flow during operation is toward the intake.
BTW I put the stock tune back in the ECM, except for the speedo setting for larger tires and the engine runs flawless once again.
2009 GMC 2500HD CC WT, LMM, MW7 - 4900 KMS
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Originally Posted by dragoonranch
Tuning by ME